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- Committer: Teddy Hogeborn
- Date: 2009-09-08 04:41:37 UTC
- Revision ID: teddy@fukt.bsnet.se-20090908044137-4cxubotvn4etoxxl
* plugins.d/mandos-client.c (main): Bug fix: Check result of setgid().
Bug fix: If taking down network
interface, do not drop privileges
completely; save them and reassert
privileges when needed.
Bug fix: If taking down network
interface, do not drop privileges
completely; save them and reassert
privileges when needed.
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
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3
#
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# Mandos server - give out binary blobs to connecting clients.
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# "AvahiService" class, and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008-2014 Teddy Hogeborn
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# Copyright © 2008-2014 Björn Påhlsson
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
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# Contact the authors at <mandos@fukt.bsnet.se>.
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#
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33
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from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
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from future_builtins import *
34
from __future__ import division, with_statement, absolute_import
38
35
39
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import SocketServer as socketserver
40
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import socket
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import argparse
38
import optparse
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import datetime
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40
import errno
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41
import gnutls.crypto
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import logging
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import logging.handlers
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import pwd
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import contextlib
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from contextlib import closing
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import struct
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60
import fcntl
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import functools
65
import cPickle as pickle
66
import multiprocessing
67
import types
68
import binascii
69
import tempfile
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import itertools
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import collections
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import dbus
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64
import dbus.service
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from dbus.mainloop.glib import DBusGMainLoop
78
68
import ctypes
79
69
import ctypes.util
80
import xml.dom.minidom
81
import inspect
82
70
83
71
try:
84
72
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
88
76
except ImportError:
89
77
SO_BINDTODEVICE = None
90
78
91
if sys.version_info.major == 2:
92
str = unicode
93
94
version = "1.6.9"
95
stored_state_file = "clients.pickle"
96
97
logger = logging.getLogger()
98
syslogger = None
99
100
try:
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
103
.if_nametoindex)
104
except (OSError, AttributeError):
105
def if_nametoindex(interface):
106
"Get an interface index the hard way, i.e. using fcntl()"
107
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
with contextlib.closing(socket.socket()) as s:
109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
struct.pack(b"16s16x", interface))
111
interface_index = struct.unpack("I", ifreq[16:20])[0]
112
return interface_index
113
114
115
def initlogger(debug, level=logging.WARNING):
116
"""init logger and add loglevel"""
117
118
global syslogger
119
syslogger = (logging.handlers.SysLogHandler
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(facility =
121
logging.handlers.SysLogHandler.LOG_DAEMON,
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address = "/dev/log"))
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syslogger.setFormatter(logging.Formatter
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('Mandos [%(process)d]: %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(syslogger)
127
128
if debug:
129
console = logging.StreamHandler()
130
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
131
' [%(process)d]:'
132
' %(levelname)s:'
133
' %(message)s'))
134
logger.addHandler(console)
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logger.setLevel(level)
136
137
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class PGPError(Exception):
139
"""Exception if encryption/decryption fails"""
140
pass
141
142
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class PGPEngine(object):
144
"""A simple class for OpenPGP symmetric encryption & decryption"""
145
def __init__(self):
146
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
147
self.gnupgargs = ['--batch',
148
'--home', self.tempdir,
149
'--force-mdc',
150
'--quiet',
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'--no-use-agent']
152
153
def __enter__(self):
154
return self
155
156
def __exit__(self, exc_type, exc_value, traceback):
157
self._cleanup()
158
return False
159
160
def __del__(self):
161
self._cleanup()
162
163
def _cleanup(self):
164
if self.tempdir is not None:
165
# Delete contents of tempdir
166
for root, dirs, files in os.walk(self.tempdir,
167
topdown = False):
168
for filename in files:
169
os.remove(os.path.join(root, filename))
170
for dirname in dirs:
171
os.rmdir(os.path.join(root, dirname))
172
# Remove tempdir
173
os.rmdir(self.tempdir)
174
self.tempdir = None
175
176
def password_encode(self, password):
177
# Passphrase can not be empty and can not contain newlines or
178
# NUL bytes. So we prefix it and hex encode it.
179
encoded = b"mandos" + binascii.hexlify(password)
180
if len(encoded) > 2048:
181
# GnuPG can't handle long passwords, so encode differently
182
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
.replace(b"\n", b"\\n")
184
.replace(b"\0", b"\\x00"))
185
return encoded
186
187
def encrypt(self, data, password):
188
passphrase = self.password_encode(password)
189
with tempfile.NamedTemporaryFile(dir=self.tempdir
190
) as passfile:
191
passfile.write(passphrase)
192
passfile.flush()
193
proc = subprocess.Popen(['gpg', '--symmetric',
194
'--passphrase-file',
195
passfile.name]
196
+ self.gnupgargs,
197
stdin = subprocess.PIPE,
198
stdout = subprocess.PIPE,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
201
if proc.returncode != 0:
202
raise PGPError(err)
203
return ciphertext
204
205
def decrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen(['gpg', '--decrypt',
212
'--passphrase-file',
213
passfile.name]
214
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
219
= data)
220
if proc.returncode != 0:
221
raise PGPError(err)
222
return decrypted_plaintext
223
79
80
version = "1.0.11"
81
82
logger = logging.Logger(u'mandos')
83
syslogger = (logging.handlers.SysLogHandler
84
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
address = "/dev/log"))
86
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
89
logger.addHandler(syslogger)
90
91
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
95
logger.addHandler(console)
224
96
225
97
class AvahiError(Exception):
226
98
def __init__(self, value, *args, **kwargs):
227
99
self.value = value
228
return super(AvahiError, self).__init__(value, *args,
229
**kwargs)
100
super(AvahiError, self).__init__(value, *args, **kwargs)
101
def __unicode__(self):
102
return unicode(repr(self.value))
230
103
231
104
class AvahiServiceError(AvahiError):
232
105
pass
241
114
Attributes:
242
115
interface: integer; avahi.IF_UNSPEC or an interface index.
243
116
Used to optionally bind to the specified interface.
244
name: string; Example: 'Mandos'
245
type: string; Example: '_mandos._tcp'.
246
See <https://www.iana.org/assignments/service-names-port-numbers>
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
119
See <http://www.dns-sd.org/ServiceTypes.html>
247
120
port: integer; what port to announce
248
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TXT: list of strings; TXT record for the service
249
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domain: string; Domain to publish on, default to .local if empty.
255
128
server: D-Bus Server
256
129
bus: dbus.SystemBus()
257
130
"""
258
259
131
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
260
132
servicetype = None, port = None, TXT = None,
261
domain = "", host = "", max_renames = 32768,
133
domain = u"", host = u"", max_renames = 32768,
262
134
protocol = avahi.PROTO_UNSPEC, bus = None):
263
135
self.interface = interface
264
136
self.name = name
273
145
self.group = None # our entry group
274
146
self.server = None
275
147
self.bus = bus
276
self.entry_group_state_changed_match = None
277
278
def rename(self, remove=True):
148
def rename(self):
279
149
"""Derived from the Avahi example code"""
280
150
if self.rename_count >= self.max_renames:
281
logger.critical("No suitable Zeroconf service name found"
282
" after %i retries, exiting.",
151
logger.critical(u"No suitable Zeroconf service name found"
152
u" after %i retries, exiting.",
283
153
self.rename_count)
284
raise AvahiServiceError("Too many renames")
285
self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
154
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
156
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
158
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
162
self.remove()
163
self.add()
287
164
self.rename_count += 1
288
logger.info("Changing Zeroconf service name to %r ...",
289
self.name)
290
if remove:
291
self.remove()
292
try:
293
self.add()
294
except dbus.exceptions.DBusException as error:
295
if (error.get_dbus_name()
296
== "org.freedesktop.Avahi.CollisionError"):
297
logger.info("Local Zeroconf service name collision.")
298
return self.rename(remove=False)
299
else:
300
logger.critical("D-Bus Exception", exc_info=error)
301
self.cleanup()
302
os._exit(1)
303
304
165
def remove(self):
305
166
"""Derived from the Avahi example code"""
306
if self.entry_group_state_changed_match is not None:
307
self.entry_group_state_changed_match.remove()
308
self.entry_group_state_changed_match = None
309
167
if self.group is not None:
310
168
self.group.Reset()
311
312
169
def add(self):
313
170
"""Derived from the Avahi example code"""
314
self.remove()
315
171
if self.group is None:
316
172
self.group = dbus.Interface(
317
173
self.bus.get_object(avahi.DBUS_NAME,
318
174
self.server.EntryGroupNew()),
319
175
avahi.DBUS_INTERFACE_ENTRY_GROUP)
320
self.entry_group_state_changed_match = (
321
self.group.connect_to_signal(
322
'StateChanged', self.entry_group_state_changed))
323
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
176
self.group.connect_to_signal('StateChanged',
177
self.entry_group_state_changed)
178
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
324
179
self.name, self.type)
325
180
self.group.AddService(
326
181
self.interface,
331
186
dbus.UInt16(self.port),
332
187
avahi.string_array_to_txt_array(self.TXT))
333
188
self.group.Commit()
334
335
189
def entry_group_state_changed(self, state, error):
336
190
"""Derived from the Avahi example code"""
337
logger.debug("Avahi entry group state change: %i", state)
191
logger.debug(u"Avahi state change: %i", state)
338
192
339
193
if state == avahi.ENTRY_GROUP_ESTABLISHED:
340
logger.debug("Zeroconf service established.")
194
logger.debug(u"Zeroconf service established.")
341
195
elif state == avahi.ENTRY_GROUP_COLLISION:
342
logger.info("Zeroconf service name collision.")
196
logger.warning(u"Zeroconf service name collision.")
343
197
self.rename()
344
198
elif state == avahi.ENTRY_GROUP_FAILURE:
345
logger.critical("Avahi: Error in group state changed %s",
346
str(error))
347
raise AvahiGroupError("State changed: {!s}"
348
.format(error))
349
199
logger.critical(u"Avahi: Error in group state changed %s",
200
unicode(error))
201
raise AvahiGroupError(u"State changed: %s"
202
% unicode(error))
350
203
def cleanup(self):
351
204
"""Derived from the Avahi example code"""
352
205
if self.group is not None:
353
try:
354
self.group.Free()
355
except (dbus.exceptions.UnknownMethodException,
356
dbus.exceptions.DBusException):
357
pass
206
self.group.Free()
358
207
self.group = None
359
self.remove()
360
361
def server_state_changed(self, state, error=None):
208
def server_state_changed(self, state):
362
209
"""Derived from the Avahi example code"""
363
logger.debug("Avahi server state change: %i", state)
364
bad_states = { avahi.SERVER_INVALID:
365
"Zeroconf server invalid",
366
avahi.SERVER_REGISTERING: None,
367
avahi.SERVER_COLLISION:
368
"Zeroconf server name collision",
369
avahi.SERVER_FAILURE:
370
"Zeroconf server failure" }
371
if state in bad_states:
372
if bad_states[state] is not None:
373
if error is None:
374
logger.error(bad_states[state])
375
else:
376
logger.error(bad_states[state] + ": %r", error)
377
self.cleanup()
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
378
213
elif state == avahi.SERVER_RUNNING:
379
214
self.add()
380
else:
381
if error is None:
382
logger.debug("Unknown state: %r", state)
383
else:
384
logger.debug("Unknown state: %r: %r", state, error)
385
386
215
def activate(self):
387
216
"""Derived from the Avahi example code"""
388
217
if self.server is None:
389
218
self.server = dbus.Interface(
390
219
self.bus.get_object(avahi.DBUS_NAME,
391
avahi.DBUS_PATH_SERVER,
392
follow_name_owner_changes=True),
220
avahi.DBUS_PATH_SERVER),
393
221
avahi.DBUS_INTERFACE_SERVER)
394
self.server.connect_to_signal("StateChanged",
222
self.server.connect_to_signal(u"StateChanged",
395
223
self.server_state_changed)
396
224
self.server_state_changed(self.server.GetState())
397
225
398
226
399
class AvahiServiceToSyslog(AvahiService):
400
def rename(self, *args, **kwargs):
401
"""Add the new name to the syslog messages"""
402
ret = AvahiService.rename(self, *args, **kwargs)
403
syslogger.setFormatter(logging.Formatter
404
('Mandos ({}) [%(process)d]:'
405
' %(levelname)s: %(message)s'
406
.format(self.name)))
407
return ret
408
409
410
227
class Client(object):
411
228
"""A representation of a client host served by this server.
412
229
413
230
Attributes:
414
approved: bool(); 'None' if not yet approved/disapproved
415
approval_delay: datetime.timedelta(); Time to wait for approval
416
approval_duration: datetime.timedelta(); Duration of one approval
231
name: string; from the config file, used in log messages and
232
D-Bus identifiers
233
fingerprint: string (40 or 32 hexadecimal digits); used to
234
uniquely identify the client
235
secret: bytestring; sent verbatim (over TLS) to client
236
host: string; available for use by the checker command
237
created: datetime.datetime(); (UTC) object creation
238
last_enabled: datetime.datetime(); (UTC)
239
enabled: bool()
240
last_checked_ok: datetime.datetime(); (UTC) or None
241
timeout: datetime.timedelta(); How long from last_checked_ok
242
until this client is invalid
243
interval: datetime.timedelta(); How often to start a new checker
244
disable_hook: If set, called by disable() as disable_hook(self)
417
245
checker: subprocess.Popen(); a running checker process used
418
246
to see if the client lives.
419
247
'None' if no process is running.
420
checker_callback_tag: a gobject event source tag, or None
421
checker_command: string; External command which is run to check
422
if client lives. %() expansions are done at
248
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
250
checker_callback_tag: - '' -
251
checker_command: string; External command which is run to check if
252
client lives. %() expansions are done at
423
253
runtime with vars(self) as dict, so that for
424
254
instance %(name)s can be used in the command.
425
checker_initiator_tag: a gobject event source tag, or None
426
created: datetime.datetime(); (UTC) object creation
427
client_structure: Object describing what attributes a client has
428
and is used for storing the client at exit
429
255
current_checker_command: string; current running checker_command
430
disable_initiator_tag: a gobject event source tag, or None
431
enabled: bool()
432
fingerprint: string (40 or 32 hexadecimal digits); used to
433
uniquely identify the client
434
host: string; available for use by the checker command
435
interval: datetime.timedelta(); How often to start a new checker
436
last_approval_request: datetime.datetime(); (UTC) or None
437
last_checked_ok: datetime.datetime(); (UTC) or None
438
last_checker_status: integer between 0 and 255 reflecting exit
439
status of last checker. -1 reflects crashed
440
checker, -2 means no checker completed yet.
441
last_enabled: datetime.datetime(); (UTC) or None
442
name: string; from the config file, used in log messages and
443
D-Bus identifiers
444
secret: bytestring; sent verbatim (over TLS) to client
445
timeout: datetime.timedelta(); How long from last_checked_ok
446
until this client is disabled
447
extended_timeout: extra long timeout when secret has been sent
448
runtime_expansions: Allowed attributes for runtime expansion.
449
expires: datetime.datetime(); time (UTC) when a client will be
450
disabled, or None
451
server_settings: The server_settings dict from main()
452
256
"""
453
257
454
runtime_expansions = ("approval_delay", "approval_duration",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
458
"last_enabled", "name", "timeout")
459
client_defaults = { "timeout": "PT5M",
460
"extended_timeout": "PT15M",
461
"interval": "PT2M",
462
"checker": "fping -q -- %%(host)s",
463
"host": "",
464
"approval_delay": "PT0S",
465
"approval_duration": "PT1S",
466
"approved_by_default": "True",
467
"enabled": "True",
468
}
469
470
258
@staticmethod
471
def config_parser(config):
472
"""Construct a new dict of client settings of this form:
473
{ client_name: {setting_name: value, ...}, ...}
474
with exceptions for any special settings as defined above.
475
NOTE: Must be a pure function. Must return the same result
476
value given the same arguments.
477
"""
478
settings = {}
479
for client_name in config.sections():
480
section = dict(config.items(client_name))
481
client = settings[client_name] = {}
482
483
client["host"] = section["host"]
484
# Reformat values from string types to Python types
485
client["approved_by_default"] = config.getboolean(
486
client_name, "approved_by_default")
487
client["enabled"] = config.getboolean(client_name,
488
"enabled")
489
490
client["fingerprint"] = (section["fingerprint"].upper()
491
.replace(" ", ""))
492
if "secret" in section:
493
client["secret"] = section["secret"].decode("base64")
494
elif "secfile" in section:
495
with open(os.path.expanduser(os.path.expandvars
496
(section["secfile"])),
497
"rb") as secfile:
498
client["secret"] = secfile.read()
499
else:
500
raise TypeError("No secret or secfile for section {}"
501
.format(section))
502
client["timeout"] = string_to_delta(section["timeout"])
503
client["extended_timeout"] = string_to_delta(
504
section["extended_timeout"])
505
client["interval"] = string_to_delta(section["interval"])
506
client["approval_delay"] = string_to_delta(
507
section["approval_delay"])
508
client["approval_duration"] = string_to_delta(
509
section["approval_duration"])
510
client["checker_command"] = section["checker"]
511
client["last_approval_request"] = None
512
client["last_checked_ok"] = None
513
client["last_checker_status"] = -2
514
515
return settings
516
517
def __init__(self, settings, name = None, server_settings=None):
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
264
265
def timeout_milliseconds(self):
266
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
268
269
def interval_milliseconds(self):
270
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
272
273
def __init__(self, name = None, disable_hook=None, config=None):
274
"""Note: the 'checker' key in 'config' sets the
275
'checker_command' attribute and *not* the 'checker'
276
attribute."""
518
277
self.name = name
519
if server_settings is None:
520
server_settings = {}
521
self.server_settings = server_settings
522
# adding all client settings
523
for setting, value in settings.items():
524
setattr(self, setting, value)
525
526
if self.enabled:
527
if not hasattr(self, "last_enabled"):
528
self.last_enabled = datetime.datetime.utcnow()
529
if not hasattr(self, "expires"):
530
self.expires = (datetime.datetime.utcnow()
531
+ self.timeout)
532
else:
533
self.last_enabled = None
534
self.expires = None
535
536
logger.debug("Creating client %r", self.name)
278
if config is None:
279
config = {}
280
logger.debug(u"Creating client %r", self.name)
537
281
# Uppercase and remove spaces from fingerprint for later
538
282
# comparison purposes with return value from the fingerprint()
539
283
# function
540
logger.debug(" Fingerprint: %s", self.fingerprint)
541
self.created = settings.get("created",
542
datetime.datetime.utcnow())
543
544
# attributes specific for this server instance
284
self.fingerprint = (config[u"fingerprint"].upper()
285
.replace(u" ", u""))
286
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
290
with closing(open(os.path.expanduser
291
(os.path.expandvars
292
(config[u"secfile"])))) as secfile:
293
self.secret = secfile.read()
294
else:
295
raise TypeError(u"No secret or secfile for client %s"
296
% self.name)
297
self.host = config.get(u"host", u"")
298
self.created = datetime.datetime.utcnow()
299
self.enabled = False
300
self.last_enabled = None
301
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
304
self.disable_hook = disable_hook
545
305
self.checker = None
546
306
self.checker_initiator_tag = None
547
307
self.disable_initiator_tag = None
548
308
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
549
310
self.current_checker_command = None
550
self.approved = None
551
self.approvals_pending = 0
552
self.changedstate = (multiprocessing_manager
553
.Condition(multiprocessing_manager
554
.Lock()))
555
self.client_structure = [attr for attr in
556
self.__dict__.iterkeys()
557
if not attr.startswith("_")]
558
self.client_structure.append("client_structure")
559
560
for name, t in inspect.getmembers(type(self),
561
lambda obj:
562
isinstance(obj,
563
property)):
564
if not name.startswith("_"):
565
self.client_structure.append(name)
566
567
# Send notice to process children that client state has changed
568
def send_changedstate(self):
569
with self.changedstate:
570
self.changedstate.notify_all()
311
self.last_connect = None
571
312
572
313
def enable(self):
573
314
"""Start this client's checker and timeout hooks"""
574
if getattr(self, "enabled", False):
315
if getattr(self, u"enabled", False):
575
316
# Already enabled
576
317
return
577
self.expires = datetime.datetime.utcnow() + self.timeout
578
self.enabled = True
579
318
self.last_enabled = datetime.datetime.utcnow()
580
self.init_checker()
581
self.send_changedstate()
582
583
def disable(self, quiet=True):
584
"""Disable this client."""
585
if not getattr(self, "enabled", False):
586
return False
587
if not quiet:
588
logger.info("Disabling client %s", self.name)
589
if getattr(self, "disable_initiator_tag", None) is not None:
590
gobject.source_remove(self.disable_initiator_tag)
591
self.disable_initiator_tag = None
592
self.expires = None
593
if getattr(self, "checker_initiator_tag", None) is not None:
594
gobject.source_remove(self.checker_initiator_tag)
595
self.checker_initiator_tag = None
596
self.stop_checker()
597
self.enabled = False
598
if not quiet:
599
self.send_changedstate()
600
# Do not run this again if called by a gobject.timeout_add
601
return False
602
603
def __del__(self):
604
self.disable()
605
606
def init_checker(self):
607
319
# Schedule a new checker to be started an 'interval' from now,
608
320
# and every interval from then on.
609
if self.checker_initiator_tag is not None:
610
gobject.source_remove(self.checker_initiator_tag)
611
321
self.checker_initiator_tag = (gobject.timeout_add
612
(int(self.interval
613
.total_seconds() * 1000),
322
(self.interval_milliseconds(),
614
323
self.start_checker))
324
# Also start a new checker *right now*.
325
self.start_checker()
615
326
# Schedule a disable() when 'timeout' has passed
616
if self.disable_initiator_tag is not None:
327
self.disable_initiator_tag = (gobject.timeout_add
328
(self.timeout_milliseconds(),
329
self.disable))
330
self.enabled = True
331
332
def disable(self):
333
"""Disable this client."""
334
if not getattr(self, "enabled", False):
335
return False
336
logger.info(u"Disabling client %s", self.name)
337
if getattr(self, u"disable_initiator_tag", False):
617
338
gobject.source_remove(self.disable_initiator_tag)
618
self.disable_initiator_tag = (gobject.timeout_add
619
(int(self.timeout
620
.total_seconds() * 1000),
621
self.disable))
622
# Also start a new checker *right now*.
623
self.start_checker()
339
self.disable_initiator_tag = None
340
if getattr(self, u"checker_initiator_tag", False):
341
gobject.source_remove(self.checker_initiator_tag)
342
self.checker_initiator_tag = None
343
self.stop_checker()
344
if self.disable_hook:
345
self.disable_hook(self)
346
self.enabled = False
347
# Do not run this again if called by a gobject.timeout_add
348
return False
349
350
def __del__(self):
351
self.disable_hook = None
352
self.disable()
624
353
625
354
def checker_callback(self, pid, condition, command):
626
355
"""The checker has completed, so take appropriate actions."""
627
356
self.checker_callback_tag = None
628
357
self.checker = None
629
358
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
631
if self.last_checker_status == 0:
632
logger.info("Checker for %(name)s succeeded",
359
exitstatus = os.WEXITSTATUS(condition)
360
if exitstatus == 0:
361
logger.info(u"Checker for %(name)s succeeded",
633
362
vars(self))
634
363
self.checked_ok()
635
364
else:
636
logger.info("Checker for %(name)s failed",
365
logger.info(u"Checker for %(name)s failed",
637
366
vars(self))
638
367
else:
639
self.last_checker_status = -1
640
logger.warning("Checker for %(name)s crashed?",
368
logger.warning(u"Checker for %(name)s crashed?",
641
369
vars(self))
642
370
643
371
def checked_ok(self):
644
"""Assert that the client has been seen, alive and well."""
372
"""Bump up the timeout for this client.
373
374
This should only be called when the client has been seen,
375
alive and well.
376
"""
645
377
self.last_checked_ok = datetime.datetime.utcnow()
646
self.last_checker_status = 0
647
self.bump_timeout()
648
649
def bump_timeout(self, timeout=None):
650
"""Bump up the timeout for this client."""
651
if timeout is None:
652
timeout = self.timeout
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = None
656
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(int(timeout.total_seconds()
659
* 1000), self.disable))
660
self.expires = datetime.datetime.utcnow() + timeout
661
662
def need_approval(self):
663
self.last_approval_request = datetime.datetime.utcnow()
378
gobject.source_remove(self.disable_initiator_tag)
379
self.disable_initiator_tag = (gobject.timeout_add
380
(self.timeout_milliseconds(),
381
self.disable))
664
382
665
383
def start_checker(self):
666
384
"""Start a new checker subprocess if one is not running.
668
386
If a checker already exists, leave it running and do
669
387
nothing."""
670
388
# The reason for not killing a running checker is that if we
671
# did that, and if a checker (for some reason) started running
672
# slowly and taking more than 'interval' time, then the client
673
# would inevitably timeout, since no checker would get a
674
# chance to run to completion. If we instead leave running
389
# did that, then if a checker (for some reason) started
390
# running slowly and taking more than 'interval' time, the
391
# client would inevitably timeout, since no checker would get
392
# a chance to run to completion. If we instead leave running
675
393
# checkers alone, the checker would have to take more time
676
# than 'timeout' for the client to be disabled, which is as it
677
# should be.
394
# than 'timeout' for the client to be declared invalid, which
395
# is as it should be.
678
396
679
397
# If a checker exists, make sure it is not a zombie
680
try:
398
if self.checker is not None:
681
399
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except AttributeError:
683
pass
684
except OSError as error:
685
if error.errno != errno.ECHILD:
686
raise
687
else:
688
400
if pid:
689
logger.warning("Checker was a zombie")
401
logger.warning(u"Checker was a zombie")
690
402
gobject.source_remove(self.checker_callback_tag)
691
403
self.checker_callback(pid, status,
692
404
self.current_checker_command)
693
405
# Start a new checker if needed
694
406
if self.checker is None:
695
# Escape attributes for the shell
696
escaped_attrs = { attr:
697
re.escape(str(getattr(self, attr)))
698
for attr in self.runtime_expansions }
699
407
try:
700
command = self.checker_command % escaped_attrs
701
except TypeError as error:
702
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
408
# In case checker_command has exactly one % operator
409
command = self.checker_command % self.host
410
except TypeError:
411
# Escape attributes for the shell
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
414
errors=
415
u'replace')))
416
for key, val in
417
vars(self).iteritems())
418
try:
419
command = self.checker_command % escaped_attrs
420
except TypeError, error:
421
logger.error(u'Could not format string "%s":'
422
u' %s', self.checker_command, error)
423
return True # Try again later
705
424
self.current_checker_command = command
706
425
try:
707
logger.info("Starting checker %r for %s",
426
logger.info(u"Starting checker %r for %s",
708
427
command, self.name)
709
428
# We don't need to redirect stdout and stderr, since
710
429
# in normal mode, that is already done by daemon(),
711
430
# and in debug mode we don't want to. (Stdin is
712
431
# always replaced by /dev/null.)
713
# The exception is when not debugging but nevertheless
714
# running in the foreground; use the previously
715
# created wnull.
716
popen_args = {}
717
if (not self.server_settings["debug"]
718
and self.server_settings["foreground"]):
719
popen_args.update({"stdout": wnull,
720
"stderr": wnull })
721
432
self.checker = subprocess.Popen(command,
722
433
close_fds=True,
723
shell=True, cwd="/",
724
**popen_args)
725
except OSError as error:
726
logger.error("Failed to start subprocess",
727
exc_info=error)
728
return True
729
self.checker_callback_tag = (gobject.child_watch_add
730
(self.checker.pid,
731
self.checker_callback,
732
data=command))
733
# The checker may have completed before the gobject
734
# watch was added. Check for this.
735
try:
434
shell=True, cwd=u"/")
435
self.checker_callback_tag = (gobject.child_watch_add
436
(self.checker.pid,
437
self.checker_callback,
438
data=command))
439
# The checker may have completed before the gobject
440
# watch was added. Check for this.
736
441
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
737
except OSError as error:
738
if error.errno == errno.ECHILD:
739
# This should never happen
740
logger.error("Child process vanished",
741
exc_info=error)
742
return True
743
raise
744
if pid:
745
gobject.source_remove(self.checker_callback_tag)
746
self.checker_callback(pid, status, command)
442
if pid:
443
gobject.source_remove(self.checker_callback_tag)
444
self.checker_callback(pid, status, command)
445
except OSError, error:
446
logger.error(u"Failed to start subprocess: %s",
447
error)
747
448
# Re-run this periodically if run by gobject.timeout_add
748
449
return True
749
450
752
453
if self.checker_callback_tag:
753
454
gobject.source_remove(self.checker_callback_tag)
754
455
self.checker_callback_tag = None
755
if getattr(self, "checker", None) is None:
456
if getattr(self, u"checker", None) is None:
756
457
return
757
logger.debug("Stopping checker for %(name)s", vars(self))
458
logger.debug(u"Stopping checker for %(name)s", vars(self))
758
459
try:
759
self.checker.terminate()
760
#time.sleep(0.5)
460
os.kill(self.checker.pid, signal.SIGTERM)
461
#os.sleep(0.5)
761
462
#if self.checker.poll() is None:
762
# self.checker.kill()
763
except OSError as error:
463
# os.kill(self.checker.pid, signal.SIGKILL)
464
except OSError, error:
764
465
if error.errno != errno.ESRCH: # No such process
765
466
raise
766
467
self.checker = None
767
768
769
def dbus_service_property(dbus_interface, signature="v",
770
access="readwrite", byte_arrays=False):
771
"""Decorators for marking methods of a DBusObjectWithProperties to
772
become properties on the D-Bus.
773
774
The decorated method will be called with no arguments by "Get"
775
and with one argument by "Set".
776
777
The parameters, where they are supported, are the same as
778
dbus.service.method, except there is only "signature", since the
779
type from Get() and the type sent to Set() is the same.
780
"""
781
# Encoding deeply encoded byte arrays is not supported yet by the
782
# "Set" method, so we fail early here:
783
if byte_arrays and signature != "ay":
784
raise ValueError("Byte arrays not supported for non-'ay'"
785
" signature {!r}".format(signature))
786
def decorator(func):
787
func._dbus_is_property = True
788
func._dbus_interface = dbus_interface
789
func._dbus_signature = signature
790
func._dbus_access = access
791
func._dbus_name = func.__name__
792
if func._dbus_name.endswith("_dbus_property"):
793
func._dbus_name = func._dbus_name[:-14]
794
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
795
return func
796
return decorator
797
798
799
def dbus_interface_annotations(dbus_interface):
800
"""Decorator for marking functions returning interface annotations
801
802
Usage:
803
804
@dbus_interface_annotations("org.example.Interface")
805
def _foo(self): # Function name does not matter
806
return {"org.freedesktop.DBus.Deprecated": "true",
807
"org.freedesktop.DBus.Property.EmitsChangedSignal":
808
"false"}
809
"""
810
def decorator(func):
811
func._dbus_is_interface = True
812
func._dbus_interface = dbus_interface
813
func._dbus_name = dbus_interface
814
return func
815
return decorator
816
817
818
def dbus_annotations(annotations):
819
"""Decorator to annotate D-Bus methods, signals or properties
820
Usage:
821
822
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
823
"org.freedesktop.DBus.Property."
824
"EmitsChangedSignal": "false"})
825
@dbus_service_property("org.example.Interface", signature="b",
826
access="r")
827
def Property_dbus_property(self):
828
return dbus.Boolean(False)
829
"""
830
def decorator(func):
831
func._dbus_annotations = annotations
832
return func
833
return decorator
834
835
836
class DBusPropertyException(dbus.exceptions.DBusException):
837
"""A base class for D-Bus property-related exceptions
838
"""
839
pass
840
841
class DBusPropertyAccessException(DBusPropertyException):
842
"""A property's access permissions disallows an operation.
843
"""
844
pass
845
846
847
class DBusPropertyNotFound(DBusPropertyException):
848
"""An attempt was made to access a non-existing property.
849
"""
850
pass
851
852
853
class DBusObjectWithProperties(dbus.service.Object):
854
"""A D-Bus object with properties.
855
856
Classes inheriting from this can use the dbus_service_property
857
decorator to expose methods as D-Bus properties. It exposes the
858
standard Get(), Set(), and GetAll() methods on the D-Bus.
859
"""
860
861
@staticmethod
862
def _is_dbus_thing(thing):
863
"""Returns a function testing if an attribute is a D-Bus thing
864
865
If called like _is_dbus_thing("method") it returns a function
866
suitable for use as predicate to inspect.getmembers().
867
"""
868
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
869
False)
870
871
def _get_all_dbus_things(self, thing):
872
"""Returns a generator of (name, attribute) pairs
873
"""
874
return ((getattr(athing.__get__(self), "_dbus_name",
875
name),
876
athing.__get__(self))
877
for cls in self.__class__.__mro__
878
for name, athing in
879
inspect.getmembers(cls,
880
self._is_dbus_thing(thing)))
881
882
def _get_dbus_property(self, interface_name, property_name):
883
"""Returns a bound method if one exists which is a D-Bus
884
property with the specified name and interface.
885
"""
886
for cls in self.__class__.__mro__:
887
for name, value in (inspect.getmembers
888
(cls,
889
self._is_dbus_thing("property"))):
890
if (value._dbus_name == property_name
891
and value._dbus_interface == interface_name):
892
return value.__get__(self)
893
894
# No such property
895
raise DBusPropertyNotFound(self.dbus_object_path + ":"
896
+ interface_name + "."
897
+ property_name)
898
899
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
900
out_signature="v")
901
def Get(self, interface_name, property_name):
902
"""Standard D-Bus property Get() method, see D-Bus standard.
903
"""
904
prop = self._get_dbus_property(interface_name, property_name)
905
if prop._dbus_access == "write":
906
raise DBusPropertyAccessException(property_name)
907
value = prop()
908
if not hasattr(value, "variant_level"):
909
return value
910
return type(value)(value, variant_level=value.variant_level+1)
911
912
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
913
def Set(self, interface_name, property_name, value):
914
"""Standard D-Bus property Set() method, see D-Bus standard.
915
"""
916
prop = self._get_dbus_property(interface_name, property_name)
917
if prop._dbus_access == "read":
918
raise DBusPropertyAccessException(property_name)
919
if prop._dbus_get_args_options["byte_arrays"]:
920
# The byte_arrays option is not supported yet on
921
# signatures other than "ay".
922
if prop._dbus_signature != "ay":
923
raise ValueError("Byte arrays not supported for non-"
924
"'ay' signature {!r}"
925
.format(prop._dbus_signature))
926
value = dbus.ByteArray(b''.join(chr(byte)
927
for byte in value))
928
prop(value)
929
930
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
931
out_signature="a{sv}")
932
def GetAll(self, interface_name):
933
"""Standard D-Bus property GetAll() method, see D-Bus
934
standard.
935
936
Note: Will not include properties with access="write".
937
"""
938
properties = {}
939
for name, prop in self._get_all_dbus_things("property"):
940
if (interface_name
941
and interface_name != prop._dbus_interface):
942
# Interface non-empty but did not match
943
continue
944
# Ignore write-only properties
945
if prop._dbus_access == "write":
946
continue
947
value = prop()
948
if not hasattr(value, "variant_level"):
949
properties[name] = value
950
continue
951
properties[name] = type(value)(value, variant_level=
952
value.variant_level+1)
953
return dbus.Dictionary(properties, signature="sv")
954
955
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
956
def PropertiesChanged(self, interface_name, changed_properties,
957
invalidated_properties):
958
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
959
standard.
960
"""
961
pass
962
963
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
964
out_signature="s",
965
path_keyword='object_path',
966
connection_keyword='connection')
967
def Introspect(self, object_path, connection):
968
"""Overloading of standard D-Bus method.
969
970
Inserts property tags and interface annotation tags.
971
"""
972
xmlstring = dbus.service.Object.Introspect(self, object_path,
973
connection)
974
try:
975
document = xml.dom.minidom.parseString(xmlstring)
976
def make_tag(document, name, prop):
977
e = document.createElement("property")
978
e.setAttribute("name", name)
979
e.setAttribute("type", prop._dbus_signature)
980
e.setAttribute("access", prop._dbus_access)
981
return e
982
for if_tag in document.getElementsByTagName("interface"):
983
# Add property tags
984
for tag in (make_tag(document, name, prop)
985
for name, prop
986
in self._get_all_dbus_things("property")
987
if prop._dbus_interface
988
== if_tag.getAttribute("name")):
989
if_tag.appendChild(tag)
990
# Add annotation tags
991
for typ in ("method", "signal", "property"):
992
for tag in if_tag.getElementsByTagName(typ):
993
annots = dict()
994
for name, prop in (self.
995
_get_all_dbus_things(typ)):
996
if (name == tag.getAttribute("name")
997
and prop._dbus_interface
998
== if_tag.getAttribute("name")):
999
annots.update(getattr
1000
(prop,
1001
"_dbus_annotations",
1002
{}))
1003
for name, value in annots.items():
1004
ann_tag = document.createElement(
1005
"annotation")
1006
ann_tag.setAttribute("name", name)
1007
ann_tag.setAttribute("value", value)
1008
tag.appendChild(ann_tag)
1009
# Add interface annotation tags
1010
for annotation, value in dict(
1011
itertools.chain.from_iterable(
1012
annotations().items()
1013
for name, annotations in
1014
self._get_all_dbus_things("interface")
1015
if name == if_tag.getAttribute("name")
1016
)).items():
1017
ann_tag = document.createElement("annotation")
1018
ann_tag.setAttribute("name", annotation)
1019
ann_tag.setAttribute("value", value)
1020
if_tag.appendChild(ann_tag)
1021
# Add the names to the return values for the
1022
# "org.freedesktop.DBus.Properties" methods
1023
if (if_tag.getAttribute("name")
1024
== "org.freedesktop.DBus.Properties"):
1025
for cn in if_tag.getElementsByTagName("method"):
1026
if cn.getAttribute("name") == "Get":
1027
for arg in cn.getElementsByTagName("arg"):
1028
if (arg.getAttribute("direction")
1029
== "out"):
1030
arg.setAttribute("name", "value")
1031
elif cn.getAttribute("name") == "GetAll":
1032
for arg in cn.getElementsByTagName("arg"):
1033
if (arg.getAttribute("direction")
1034
== "out"):
1035
arg.setAttribute("name", "props")
1036
xmlstring = document.toxml("utf-8")
1037
document.unlink()
1038
except (AttributeError, xml.dom.DOMException,
1039
xml.parsers.expat.ExpatError) as error:
1040
logger.error("Failed to override Introspection method",
1041
exc_info=error)
1042
return xmlstring
1043
1044
1045
def datetime_to_dbus(dt, variant_level=0):
1046
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1047
if dt is None:
1048
return dbus.String("", variant_level = variant_level)
1049
return dbus.String(dt.isoformat(),
1050
variant_level=variant_level)
1051
1052
1053
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1054
"""A class decorator; applied to a subclass of
1055
dbus.service.Object, it will add alternate D-Bus attributes with
1056
interface names according to the "alt_interface_names" mapping.
1057
Usage:
1058
1059
@alternate_dbus_interfaces({"org.example.Interface":
1060
"net.example.AlternateInterface"})
1061
class SampleDBusObject(dbus.service.Object):
1062
@dbus.service.method("org.example.Interface")
1063
def SampleDBusMethod():
1064
pass
1065
1066
The above "SampleDBusMethod" on "SampleDBusObject" will be
1067
reachable via two interfaces: "org.example.Interface" and
1068
"net.example.AlternateInterface", the latter of which will have
1069
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1070
"true", unless "deprecate" is passed with a False value.
1071
1072
This works for methods and signals, and also for D-Bus properties
1073
(from DBusObjectWithProperties) and interfaces (from the
1074
dbus_interface_annotations decorator).
1075
"""
1076
def wrapper(cls):
1077
for orig_interface_name, alt_interface_name in (
1078
alt_interface_names.items()):
1079
attr = {}
1080
interface_names = set()
1081
# Go though all attributes of the class
1082
for attrname, attribute in inspect.getmembers(cls):
1083
# Ignore non-D-Bus attributes, and D-Bus attributes
1084
# with the wrong interface name
1085
if (not hasattr(attribute, "_dbus_interface")
1086
or not attribute._dbus_interface
1087
.startswith(orig_interface_name)):
1088
continue
1089
# Create an alternate D-Bus interface name based on
1090
# the current name
1091
alt_interface = (attribute._dbus_interface
1092
.replace(orig_interface_name,
1093
alt_interface_name))
1094
interface_names.add(alt_interface)
1095
# Is this a D-Bus signal?
1096
if getattr(attribute, "_dbus_is_signal", False):
1097
# Extract the original non-method undecorated
1098
# function by black magic
1099
nonmethod_func = (dict(
1100
zip(attribute.func_code.co_freevars,
1101
attribute.__closure__))["func"]
1102
.cell_contents)
1103
# Create a new, but exactly alike, function
1104
# object, and decorate it to be a new D-Bus signal
1105
# with the alternate D-Bus interface name
1106
new_function = (dbus.service.signal
1107
(alt_interface,
1108
attribute._dbus_signature)
1109
(types.FunctionType(
1110
nonmethod_func.func_code,
1111
nonmethod_func.func_globals,
1112
nonmethod_func.func_name,
1113
nonmethod_func.func_defaults,
1114
nonmethod_func.func_closure)))
1115
# Copy annotations, if any
1116
try:
1117
new_function._dbus_annotations = (
1118
dict(attribute._dbus_annotations))
1119
except AttributeError:
1120
pass
1121
# Define a creator of a function to call both the
1122
# original and alternate functions, so both the
1123
# original and alternate signals gets sent when
1124
# the function is called
1125
def fixscope(func1, func2):
1126
"""This function is a scope container to pass
1127
func1 and func2 to the "call_both" function
1128
outside of its arguments"""
1129
def call_both(*args, **kwargs):
1130
"""This function will emit two D-Bus
1131
signals by calling func1 and func2"""
1132
func1(*args, **kwargs)
1133
func2(*args, **kwargs)
1134
return call_both
1135
# Create the "call_both" function and add it to
1136
# the class
1137
attr[attrname] = fixscope(attribute, new_function)
1138
# Is this a D-Bus method?
1139
elif getattr(attribute, "_dbus_is_method", False):
1140
# Create a new, but exactly alike, function
1141
# object. Decorate it to be a new D-Bus method
1142
# with the alternate D-Bus interface name. Add it
1143
# to the class.
1144
attr[attrname] = (dbus.service.method
1145
(alt_interface,
1146
attribute._dbus_in_signature,
1147
attribute._dbus_out_signature)
1148
(types.FunctionType
1149
(attribute.func_code,
1150
attribute.func_globals,
1151
attribute.func_name,
1152
attribute.func_defaults,
1153
attribute.func_closure)))
1154
# Copy annotations, if any
1155
try:
1156
attr[attrname]._dbus_annotations = (
1157
dict(attribute._dbus_annotations))
1158
except AttributeError:
1159
pass
1160
# Is this a D-Bus property?
1161
elif getattr(attribute, "_dbus_is_property", False):
1162
# Create a new, but exactly alike, function
1163
# object, and decorate it to be a new D-Bus
1164
# property with the alternate D-Bus interface
1165
# name. Add it to the class.
1166
attr[attrname] = (dbus_service_property
1167
(alt_interface,
1168
attribute._dbus_signature,
1169
attribute._dbus_access,
1170
attribute
1171
._dbus_get_args_options
1172
["byte_arrays"])
1173
(types.FunctionType
1174
(attribute.func_code,
1175
attribute.func_globals,
1176
attribute.func_name,
1177
attribute.func_defaults,
1178
attribute.func_closure)))
1179
# Copy annotations, if any
1180
try:
1181
attr[attrname]._dbus_annotations = (
1182
dict(attribute._dbus_annotations))
1183
except AttributeError:
1184
pass
1185
# Is this a D-Bus interface?
1186
elif getattr(attribute, "_dbus_is_interface", False):
1187
# Create a new, but exactly alike, function
1188
# object. Decorate it to be a new D-Bus interface
1189
# with the alternate D-Bus interface name. Add it
1190
# to the class.
1191
attr[attrname] = (dbus_interface_annotations
1192
(alt_interface)
1193
(types.FunctionType
1194
(attribute.func_code,
1195
attribute.func_globals,
1196
attribute.func_name,
1197
attribute.func_defaults,
1198
attribute.func_closure)))
1199
if deprecate:
1200
# Deprecate all alternate interfaces
1201
iname="_AlternateDBusNames_interface_annotation{}"
1202
for interface_name in interface_names:
1203
@dbus_interface_annotations(interface_name)
1204
def func(self):
1205
return { "org.freedesktop.DBus.Deprecated":
1206
"true" }
1207
# Find an unused name
1208
for aname in (iname.format(i)
1209
for i in itertools.count()):
1210
if aname not in attr:
1211
attr[aname] = func
1212
break
1213
if interface_names:
1214
# Replace the class with a new subclass of it with
1215
# methods, signals, etc. as created above.
1216
cls = type(b"{}Alternate".format(cls.__name__),
1217
(cls,), attr)
1218
return cls
1219
return wrapper
1220
1221
1222
@alternate_dbus_interfaces({"se.recompile.Mandos":
1223
"se.bsnet.fukt.Mandos"})
1224
class ClientDBus(Client, DBusObjectWithProperties):
468
469
def still_valid(self):
470
"""Has the timeout not yet passed for this client?"""
471
if not getattr(self, u"enabled", False):
472
return False
473
now = datetime.datetime.utcnow()
474
if self.last_checked_ok is None:
475
return now < (self.created + self.timeout)
476
else:
477
return now < (self.last_checked_ok + self.timeout)
478
479
480
class ClientDBus(Client, dbus.service.Object):
1225
481
"""A Client class using D-Bus
1226
482
1227
483
Attributes:
1228
484
dbus_object_path: dbus.ObjectPath
1229
485
bus: dbus.SystemBus()
1230
486
"""
1231
1232
runtime_expansions = (Client.runtime_expansions
1233
+ ("dbus_object_path",))
1234
1235
_interface = "se.recompile.Mandos.Client"
1236
1237
487
# dbus.service.Object doesn't use super(), so we can't either.
1238
488
1239
489
def __init__(self, bus = None, *args, **kwargs):
1241
491
Client.__init__(self, *args, **kwargs)
1242
492
# Only now, when this client is initialized, can it show up on
1243
493
# the D-Bus
1244
client_object_name = str(self.name).translate(
1245
{ord("."): ord("_"),
1246
ord("-"): ord("_")})
1247
494
self.dbus_object_path = (dbus.ObjectPath
1248
("/clients/" + client_object_name))
1249
DBusObjectWithProperties.__init__(self, self.bus,
1250
self.dbus_object_path)
1251
1252
def notifychangeproperty(transform_func,
1253
dbus_name, type_func=lambda x: x,
1254
variant_level=1, invalidate_only=False,
1255
_interface=_interface):
1256
""" Modify a variable so that it's a property which announces
1257
its changes to DBus.
1258
1259
transform_fun: Function that takes a value and a variant_level
1260
and transforms it to a D-Bus type.
1261
dbus_name: D-Bus name of the variable
1262
type_func: Function that transform the value before sending it
1263
to the D-Bus. Default: no transform
1264
variant_level: D-Bus variant level. Default: 1
1265
"""
1266
attrname = "_{}".format(dbus_name)
1267
def setter(self, value):
1268
if hasattr(self, "dbus_object_path"):
1269
if (not hasattr(self, attrname) or
1270
type_func(getattr(self, attrname, None))
1271
!= type_func(value)):
1272
if invalidate_only:
1273
self.PropertiesChanged(_interface,
1274
dbus.Dictionary(),
1275
dbus.Array
1276
((dbus_name,)))
1277
else:
1278
dbus_value = transform_func(type_func(value),
1279
variant_level
1280
=variant_level)
1281
self.PropertyChanged(dbus.String(dbus_name),
1282
dbus_value)
1283
self.PropertiesChanged(_interface,
1284
dbus.Dictionary({
1285
dbus.String(dbus_name):
1286
dbus_value }), dbus.Array())
1287
setattr(self, attrname, value)
1288
1289
return property(lambda self: getattr(self, attrname), setter)
1290
1291
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1292
approvals_pending = notifychangeproperty(dbus.Boolean,
1293
"ApprovalPending",
1294
type_func = bool)
1295
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1296
last_enabled = notifychangeproperty(datetime_to_dbus,
1297
"LastEnabled")
1298
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1299
type_func = lambda checker:
1300
checker is not None)
1301
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1302
"LastCheckedOK")
1303
last_checker_status = notifychangeproperty(dbus.Int16,
1304
"LastCheckerStatus")
1305
last_approval_request = notifychangeproperty(
1306
datetime_to_dbus, "LastApprovalRequest")
1307
approved_by_default = notifychangeproperty(dbus.Boolean,
1308
"ApprovedByDefault")
1309
approval_delay = notifychangeproperty(dbus.UInt64,
1310
"ApprovalDelay",
1311
type_func =
1312
lambda td: td.total_seconds()
1313
* 1000)
1314
approval_duration = notifychangeproperty(
1315
dbus.UInt64, "ApprovalDuration",
1316
type_func = lambda td: td.total_seconds() * 1000)
1317
host = notifychangeproperty(dbus.String, "Host")
1318
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1319
type_func = lambda td:
1320
td.total_seconds() * 1000)
1321
extended_timeout = notifychangeproperty(
1322
dbus.UInt64, "ExtendedTimeout",
1323
type_func = lambda td: td.total_seconds() * 1000)
1324
interval = notifychangeproperty(dbus.UInt64,
1325
"Interval",
1326
type_func =
1327
lambda td: td.total_seconds()
1328
* 1000)
1329
checker_command = notifychangeproperty(dbus.String, "Checker")
1330
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1331
invalidate_only=True)
1332
1333
del notifychangeproperty
495
(u"/clients/"
496
+ self.name.replace(u".", u"_")))
497
dbus.service.Object.__init__(self, self.bus,
498
self.dbus_object_path)
499
500
@staticmethod
501
def _datetime_to_dbus(dt, variant_level=0):
502
"""Convert a UTC datetime.datetime() to a D-Bus type."""
503
return dbus.String(dt.isoformat(),
504
variant_level=variant_level)
505
506
def enable(self):
507
oldstate = getattr(self, u"enabled", False)
508
r = Client.enable(self)
509
if oldstate != self.enabled:
510
# Emit D-Bus signals
511
self.PropertyChanged(dbus.String(u"enabled"),
512
dbus.Boolean(True, variant_level=1))
513
self.PropertyChanged(
514
dbus.String(u"last_enabled"),
515
self._datetime_to_dbus(self.last_enabled,
516
variant_level=1))
517
return r
518
519
def disable(self, signal = True):
520
oldstate = getattr(self, u"enabled", False)
521
r = Client.disable(self)
522
if signal and oldstate != self.enabled:
523
# Emit D-Bus signal
524
self.PropertyChanged(dbus.String(u"enabled"),
525
dbus.Boolean(False, variant_level=1))
526
return r
1334
527
1335
528
def __del__(self, *args, **kwargs):
1336
529
try:
1337
530
self.remove_from_connection()
1338
531
except LookupError:
1339
532
pass
1340
if hasattr(DBusObjectWithProperties, "__del__"):
1341
DBusObjectWithProperties.__del__(self, *args, **kwargs)
533
if hasattr(dbus.service.Object, u"__del__"):
534
dbus.service.Object.__del__(self, *args, **kwargs)
1342
535
Client.__del__(self, *args, **kwargs)
1343
536
1344
537
def checker_callback(self, pid, condition, command,
1345
538
*args, **kwargs):
1346
539
self.checker_callback_tag = None
1347
540
self.checker = None
541
# Emit D-Bus signal
542
self.PropertyChanged(dbus.String(u"checker_running"),
543
dbus.Boolean(False, variant_level=1))
1348
544
if os.WIFEXITED(condition):
1349
545
exitstatus = os.WEXITSTATUS(condition)
1350
546
# Emit D-Bus signal
1360
556
return Client.checker_callback(self, pid, condition, command,
1361
557
*args, **kwargs)
1362
558
559
def checked_ok(self, *args, **kwargs):
560
r = Client.checked_ok(self, *args, **kwargs)
561
# Emit D-Bus signal
562
self.PropertyChanged(
563
dbus.String(u"last_checked_ok"),
564
(self._datetime_to_dbus(self.last_checked_ok,
565
variant_level=1)))
566
return r
567
1363
568
def start_checker(self, *args, **kwargs):
1364
old_checker_pid = getattr(self.checker, "pid", None)
569
old_checker = self.checker
570
if self.checker is not None:
571
old_checker_pid = self.checker.pid
572
else:
573
old_checker_pid = None
1365
574
r = Client.start_checker(self, *args, **kwargs)
1366
575
# Only if new checker process was started
1367
576
if (self.checker is not None
1368
577
and old_checker_pid != self.checker.pid):
1369
578
# Emit D-Bus signal
1370
579
self.CheckerStarted(self.current_checker_command)
1371
return r
1372
1373
def _reset_approved(self):
1374
self.approved = None
1375
return False
1376
1377
def approve(self, value=True):
1378
self.approved = value
1379
gobject.timeout_add(int(self.approval_duration.total_seconds()
1380
* 1000), self._reset_approved)
1381
self.send_changedstate()
1382
1383
## D-Bus methods, signals & properties
1384
1385
## Interfaces
1386
1387
## Signals
580
self.PropertyChanged(
581
dbus.String(u"checker_running"),
582
dbus.Boolean(True, variant_level=1))
583
return r
584
585
def stop_checker(self, *args, **kwargs):
586
old_checker = getattr(self, u"checker", None)
587
r = Client.stop_checker(self, *args, **kwargs)
588
if (old_checker is not None
589
and getattr(self, u"checker", None) is None):
590
self.PropertyChanged(dbus.String(u"checker_running"),
591
dbus.Boolean(False, variant_level=1))
592
return r
593
594
## D-Bus methods & signals
595
_interface = u"se.bsnet.fukt.Mandos.Client"
596
597
# CheckedOK - method
598
@dbus.service.method(_interface)
599
def CheckedOK(self):
600
return self.checked_ok()
1388
601
1389
602
# CheckerCompleted - signal
1390
@dbus.service.signal(_interface, signature="nxs")
603
@dbus.service.signal(_interface, signature=u"nxs")
1391
604
def CheckerCompleted(self, exitcode, waitstatus, command):
1392
605
"D-Bus signal"
1393
606
pass
1394
607
1395
608
# CheckerStarted - signal
1396
@dbus.service.signal(_interface, signature="s")
609
@dbus.service.signal(_interface, signature=u"s")
1397
610
def CheckerStarted(self, command):
1398
611
"D-Bus signal"
1399
612
pass
1400
613
614
# GetAllProperties - method
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
616
def GetAllProperties(self):
617
"D-Bus method"
618
return dbus.Dictionary({
619
dbus.String(u"name"):
620
dbus.String(self.name, variant_level=1),
621
dbus.String(u"fingerprint"):
622
dbus.String(self.fingerprint, variant_level=1),
623
dbus.String(u"host"):
624
dbus.String(self.host, variant_level=1),
625
dbus.String(u"created"):
626
self._datetime_to_dbus(self.created,
627
variant_level=1),
628
dbus.String(u"last_enabled"):
629
(self._datetime_to_dbus(self.last_enabled,
630
variant_level=1)
631
if self.last_enabled is not None
632
else dbus.Boolean(False, variant_level=1)),
633
dbus.String(u"enabled"):
634
dbus.Boolean(self.enabled, variant_level=1),
635
dbus.String(u"last_checked_ok"):
636
(self._datetime_to_dbus(self.last_checked_ok,
637
variant_level=1)
638
if self.last_checked_ok is not None
639
else dbus.Boolean (False, variant_level=1)),
640
dbus.String(u"timeout"):
641
dbus.UInt64(self.timeout_milliseconds(),
642
variant_level=1),
643
dbus.String(u"interval"):
644
dbus.UInt64(self.interval_milliseconds(),
645
variant_level=1),
646
dbus.String(u"checker"):
647
dbus.String(self.checker_command,
648
variant_level=1),
649
dbus.String(u"checker_running"):
650
dbus.Boolean(self.checker is not None,
651
variant_level=1),
652
dbus.String(u"object_path"):
653
dbus.ObjectPath(self.dbus_object_path,
654
variant_level=1)
655
}, signature=u"sv")
656
657
# IsStillValid - method
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
661
1401
662
# PropertyChanged - signal
1402
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1403
@dbus.service.signal(_interface, signature="sv")
663
@dbus.service.signal(_interface, signature=u"sv")
1404
664
def PropertyChanged(self, property, value):
1405
665
"D-Bus signal"
1406
666
pass
1407
667
1408
# GotSecret - signal
668
# ReceivedSecret - signal
1409
669
@dbus.service.signal(_interface)
1410
def GotSecret(self):
1411
"""D-Bus signal
1412
Is sent after a successful transfer of secret from the Mandos
1413
server to mandos-client
1414
"""
670
def ReceivedSecret(self):
671
"D-Bus signal"
1415
672
pass
1416
673
1417
674
# Rejected - signal
1418
@dbus.service.signal(_interface, signature="s")
1419
def Rejected(self, reason):
675
@dbus.service.signal(_interface)
676
def Rejected(self):
1420
677
"D-Bus signal"
1421
678
pass
1422
679
1423
# NeedApproval - signal
1424
@dbus.service.signal(_interface, signature="tb")
1425
def NeedApproval(self, timeout, default):
1426
"D-Bus signal"
1427
return self.need_approval()
1428
1429
## Methods
1430
1431
# Approve - method
1432
@dbus.service.method(_interface, in_signature="b")
1433
def Approve(self, value):
1434
self.approve(value)
1435
1436
# CheckedOK - method
1437
@dbus.service.method(_interface)
1438
def CheckedOK(self):
1439
self.checked_ok()
680
# SetChecker - method
681
@dbus.service.method(_interface, in_signature=u"s")
682
def SetChecker(self, checker):
683
"D-Bus setter method"
684
self.checker_command = checker
685
# Emit D-Bus signal
686
self.PropertyChanged(dbus.String(u"checker"),
687
dbus.String(self.checker_command,
688
variant_level=1))
689
690
# SetHost - method
691
@dbus.service.method(_interface, in_signature=u"s")
692
def SetHost(self, host):
693
"D-Bus setter method"
694
self.host = host
695
# Emit D-Bus signal
696
self.PropertyChanged(dbus.String(u"host"),
697
dbus.String(self.host, variant_level=1))
698
699
# SetInterval - method
700
@dbus.service.method(_interface, in_signature=u"t")
701
def SetInterval(self, milliseconds):
702
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
703
# Emit D-Bus signal
704
self.PropertyChanged(dbus.String(u"interval"),
705
(dbus.UInt64(self.interval_milliseconds(),
706
variant_level=1)))
707
708
# SetSecret - method
709
@dbus.service.method(_interface, in_signature=u"ay",
710
byte_arrays=True)
711
def SetSecret(self, secret):
712
"D-Bus setter method"
713
self.secret = str(secret)
714
715
# SetTimeout - method
716
@dbus.service.method(_interface, in_signature=u"t")
717
def SetTimeout(self, milliseconds):
718
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
719
# Emit D-Bus signal
720
self.PropertyChanged(dbus.String(u"timeout"),
721
(dbus.UInt64(self.timeout_milliseconds(),
722
variant_level=1)))
1440
723
1441
724
# Enable - method
1442
725
@dbus.service.method(_interface)
1461
744
def StopChecker(self):
1462
745
self.stop_checker()
1463
746
1464
## Properties
1465
1466
# ApprovalPending - property
1467
@dbus_service_property(_interface, signature="b", access="read")
1468
def ApprovalPending_dbus_property(self):
1469
return dbus.Boolean(bool(self.approvals_pending))
1470
1471
# ApprovedByDefault - property
1472
@dbus_service_property(_interface, signature="b",
1473
access="readwrite")
1474
def ApprovedByDefault_dbus_property(self, value=None):
1475
if value is None: # get
1476
return dbus.Boolean(self.approved_by_default)
1477
self.approved_by_default = bool(value)
1478
1479
# ApprovalDelay - property
1480
@dbus_service_property(_interface, signature="t",
1481
access="readwrite")
1482
def ApprovalDelay_dbus_property(self, value=None):
1483
if value is None: # get
1484
return dbus.UInt64(self.approval_delay.total_seconds()
1485
* 1000)
1486
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1487
1488
# ApprovalDuration - property
1489
@dbus_service_property(_interface, signature="t",
1490
access="readwrite")
1491
def ApprovalDuration_dbus_property(self, value=None):
1492
if value is None: # get
1493
return dbus.UInt64(self.approval_duration.total_seconds()
1494
* 1000)
1495
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1496
1497
# Name - property
1498
@dbus_service_property(_interface, signature="s", access="read")
1499
def Name_dbus_property(self):
1500
return dbus.String(self.name)
1501
1502
# Fingerprint - property
1503
@dbus_service_property(_interface, signature="s", access="read")
1504
def Fingerprint_dbus_property(self):
1505
return dbus.String(self.fingerprint)
1506
1507
# Host - property
1508
@dbus_service_property(_interface, signature="s",
1509
access="readwrite")
1510
def Host_dbus_property(self, value=None):
1511
if value is None: # get
1512
return dbus.String(self.host)
1513
self.host = str(value)
1514
1515
# Created - property
1516
@dbus_service_property(_interface, signature="s", access="read")
1517
def Created_dbus_property(self):
1518
return datetime_to_dbus(self.created)
1519
1520
# LastEnabled - property
1521
@dbus_service_property(_interface, signature="s", access="read")
1522
def LastEnabled_dbus_property(self):
1523
return datetime_to_dbus(self.last_enabled)
1524
1525
# Enabled - property
1526
@dbus_service_property(_interface, signature="b",
1527
access="readwrite")
1528
def Enabled_dbus_property(self, value=None):
1529
if value is None: # get
1530
return dbus.Boolean(self.enabled)
1531
if value:
1532
self.enable()
1533
else:
1534
self.disable()
1535
1536
# LastCheckedOK - property
1537
@dbus_service_property(_interface, signature="s",
1538
access="readwrite")
1539
def LastCheckedOK_dbus_property(self, value=None):
1540
if value is not None:
1541
self.checked_ok()
1542
return
1543
return datetime_to_dbus(self.last_checked_ok)
1544
1545
# LastCheckerStatus - property
1546
@dbus_service_property(_interface, signature="n",
1547
access="read")
1548
def LastCheckerStatus_dbus_property(self):
1549
return dbus.Int16(self.last_checker_status)
1550
1551
# Expires - property
1552
@dbus_service_property(_interface, signature="s", access="read")
1553
def Expires_dbus_property(self):
1554
return datetime_to_dbus(self.expires)
1555
1556
# LastApprovalRequest - property
1557
@dbus_service_property(_interface, signature="s", access="read")
1558
def LastApprovalRequest_dbus_property(self):
1559
return datetime_to_dbus(self.last_approval_request)
1560
1561
# Timeout - property
1562
@dbus_service_property(_interface, signature="t",
1563
access="readwrite")
1564
def Timeout_dbus_property(self, value=None):
1565
if value is None: # get
1566
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1567
old_timeout = self.timeout
1568
self.timeout = datetime.timedelta(0, 0, 0, value)
1569
# Reschedule disabling
1570
if self.enabled:
1571
now = datetime.datetime.utcnow()
1572
self.expires += self.timeout - old_timeout
1573
if self.expires <= now:
1574
# The timeout has passed
1575
self.disable()
1576
else:
1577
if (getattr(self, "disable_initiator_tag", None)
1578
is None):
1579
return
1580
gobject.source_remove(self.disable_initiator_tag)
1581
self.disable_initiator_tag = (
1582
gobject.timeout_add(
1583
int((self.expires - now).total_seconds()
1584
* 1000), self.disable))
1585
1586
# ExtendedTimeout - property
1587
@dbus_service_property(_interface, signature="t",
1588
access="readwrite")
1589
def ExtendedTimeout_dbus_property(self, value=None):
1590
if value is None: # get
1591
return dbus.UInt64(self.extended_timeout.total_seconds()
1592
* 1000)
1593
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1594
1595
# Interval - property
1596
@dbus_service_property(_interface, signature="t",
1597
access="readwrite")
1598
def Interval_dbus_property(self, value=None):
1599
if value is None: # get
1600
return dbus.UInt64(self.interval.total_seconds() * 1000)
1601
self.interval = datetime.timedelta(0, 0, 0, value)
1602
if getattr(self, "checker_initiator_tag", None) is None:
1603
return
1604
if self.enabled:
1605
# Reschedule checker run
1606
gobject.source_remove(self.checker_initiator_tag)
1607
self.checker_initiator_tag = (gobject.timeout_add
1608
(value, self.start_checker))
1609
self.start_checker() # Start one now, too
1610
1611
# Checker - property
1612
@dbus_service_property(_interface, signature="s",
1613
access="readwrite")
1614
def Checker_dbus_property(self, value=None):
1615
if value is None: # get
1616
return dbus.String(self.checker_command)
1617
self.checker_command = str(value)
1618
1619
# CheckerRunning - property
1620
@dbus_service_property(_interface, signature="b",
1621
access="readwrite")
1622
def CheckerRunning_dbus_property(self, value=None):
1623
if value is None: # get
1624
return dbus.Boolean(self.checker is not None)
1625
if value:
1626
self.start_checker()
1627
else:
1628
self.stop_checker()
1629
1630
# ObjectPath - property
1631
@dbus_service_property(_interface, signature="o", access="read")
1632
def ObjectPath_dbus_property(self):
1633
return self.dbus_object_path # is already a dbus.ObjectPath
1634
1635
# Secret = property
1636
@dbus_service_property(_interface, signature="ay",
1637
access="write", byte_arrays=True)
1638
def Secret_dbus_property(self, value):
1639
self.secret = bytes(value)
1640
1641
747
del _interface
1642
748
1643
749
1644
class ProxyClient(object):
1645
def __init__(self, child_pipe, fpr, address):
1646
self._pipe = child_pipe
1647
self._pipe.send(('init', fpr, address))
1648
if not self._pipe.recv():
1649
raise KeyError()
1650
1651
def __getattribute__(self, name):
1652
if name == '_pipe':
1653
return super(ProxyClient, self).__getattribute__(name)
1654
self._pipe.send(('getattr', name))
1655
data = self._pipe.recv()
1656
if data[0] == 'data':
1657
return data[1]
1658
if data[0] == 'function':
1659
def func(*args, **kwargs):
1660
self._pipe.send(('funcall', name, args, kwargs))
1661
return self._pipe.recv()[1]
1662
return func
1663
1664
def __setattr__(self, name, value):
1665
if name == '_pipe':
1666
return super(ProxyClient, self).__setattr__(name, value)
1667
self._pipe.send(('setattr', name, value))
1668
1669
1670
750
class ClientHandler(socketserver.BaseRequestHandler, object):
1671
751
"""A class to handle client connections.
1672
752
1674
754
Note: This will run in its own forked process."""
1675
755
1676
756
def handle(self):
1677
with contextlib.closing(self.server.child_pipe) as child_pipe:
1678
logger.info("TCP connection from: %s",
1679
str(self.client_address))
1680
logger.debug("Pipe FD: %d",
1681
self.server.child_pipe.fileno())
1682
757
logger.info(u"TCP connection from: %s",
758
unicode(self.client_address))
759
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
# Open IPC pipe to parent process
761
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1683
762
session = (gnutls.connection
1684
763
.ClientSession(self.request,
1685
764
gnutls.connection
1686
765
.X509Credentials()))
1687
766
767
line = self.request.makefile().readline()
768
logger.debug(u"Protocol version: %r", line)
769
try:
770
if int(line.strip().split()[0]) > 1:
771
raise RuntimeError
772
except (ValueError, IndexError, RuntimeError), error:
773
logger.error(u"Unknown protocol version: %s", error)
774
return
775
1688
776
# Note: gnutls.connection.X509Credentials is really a
1689
777
# generic GnuTLS certificate credentials object so long as
1690
778
# no X.509 keys are added to it. Therefore, we can use it
1691
779
# here despite using OpenPGP certificates.
1692
780
1693
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1694
# "+AES-256-CBC", "+SHA1",
1695
# "+COMP-NULL", "+CTYPE-OPENPGP",
1696
# "+DHE-DSS"))
781
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
# u"+AES-256-CBC", u"+SHA1",
783
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
784
# u"+DHE-DSS"))
1697
785
# Use a fallback default, since this MUST be set.
1698
786
priority = self.server.gnutls_priority
1699
787
if priority is None:
1700
priority = "NORMAL"
788
priority = u"NORMAL"
1701
789
(gnutls.library.functions
1702
790
.gnutls_priority_set_direct(session._c_object,
1703
791
priority, None))
1704
792
1705
# Start communication using the Mandos protocol
1706
# Get protocol number
1707
line = self.request.makefile().readline()
1708
logger.debug("Protocol version: %r", line)
1709
try:
1710
if int(line.strip().split()[0]) > 1:
1711
raise RuntimeError(line)
1712
except (ValueError, IndexError, RuntimeError) as error:
1713
logger.error("Unknown protocol version: %s", error)
1714
return
1715
1716
# Start GnuTLS connection
1717
793
try:
1718
794
session.handshake()
1719
except gnutls.errors.GNUTLSError as error:
1720
logger.warning("Handshake failed: %s", error)
795
except gnutls.errors.GNUTLSError, error:
796
logger.warning(u"Handshake failed: %s", error)
1721
797
# Do not run session.bye() here: the session is not
1722
798
# established. Just abandon the request.
1723
799
return
1724
logger.debug("Handshake succeeded")
1725
1726
approval_required = False
800
logger.debug(u"Handshake succeeded")
1727
801
try:
1728
try:
1729
fpr = self.fingerprint(self.peer_certificate
1730
(session))
1731
except (TypeError,
1732
gnutls.errors.GNUTLSError) as error:
1733
logger.warning("Bad certificate: %s", error)
1734
return
1735
logger.debug("Fingerprint: %s", fpr)
1736
1737
try:
1738
client = ProxyClient(child_pipe, fpr,
1739
self.client_address)
1740
except KeyError:
1741
return
1742
1743
if client.approval_delay:
1744
delay = client.approval_delay
1745
client.approvals_pending += 1
1746
approval_required = True
1747
1748
while True:
1749
if not client.enabled:
1750
logger.info("Client %s is disabled",
1751
client.name)
1752
if self.server.use_dbus:
1753
# Emit D-Bus signal
1754
client.Rejected("Disabled")
1755
return
1756
1757
if client.approved or not client.approval_delay:
1758
#We are approved or approval is disabled
1759
break
1760
elif client.approved is None:
1761
logger.info("Client %s needs approval",
1762
client.name)
1763
if self.server.use_dbus:
1764
# Emit D-Bus signal
1765
client.NeedApproval(
1766
client.approval_delay.total_seconds()
1767
* 1000, client.approved_by_default)
1768
else:
1769
logger.warning("Client %s was not approved",
1770
client.name)
1771
if self.server.use_dbus:
1772
# Emit D-Bus signal
1773
client.Rejected("Denied")
1774
return
1775
1776
#wait until timeout or approved
1777
time = datetime.datetime.now()
1778
client.changedstate.acquire()
1779
client.changedstate.wait(delay.total_seconds())
1780
client.changedstate.release()
1781
time2 = datetime.datetime.now()
1782
if (time2 - time) >= delay:
1783
if not client.approved_by_default:
1784
logger.warning("Client %s timed out while"
1785
" waiting for approval",
1786
client.name)
1787
if self.server.use_dbus:
1788
# Emit D-Bus signal
1789
client.Rejected("Approval timed out")
1790
return
1791
else:
1792
break
1793
else:
1794
delay -= time2 - time
1795
1796
sent_size = 0
1797
while sent_size < len(client.secret):
1798
try:
1799
sent = session.send(client.secret[sent_size:])
1800
except gnutls.errors.GNUTLSError as error:
1801
logger.warning("gnutls send failed",
1802
exc_info=error)
1803
return
1804
logger.debug("Sent: %d, remaining: %d",
1805
sent, len(client.secret)
1806
- (sent_size + sent))
1807
sent_size += sent
1808
1809
logger.info("Sending secret to %s", client.name)
1810
# bump the timeout using extended_timeout
1811
client.bump_timeout(client.extended_timeout)
1812
if self.server.use_dbus:
1813
# Emit D-Bus signal
1814
client.GotSecret()
802
fpr = self.fingerprint(self.peer_certificate(session))
803
except (TypeError, gnutls.errors.GNUTLSError), error:
804
logger.warning(u"Bad certificate: %s", error)
805
session.bye()
806
return
807
logger.debug(u"Fingerprint: %s", fpr)
1815
808
1816
finally:
1817
if approval_required:
1818
client.approvals_pending -= 1
1819
try:
1820
session.bye()
1821
except gnutls.errors.GNUTLSError as error:
1822
logger.warning("GnuTLS bye failed",
1823
exc_info=error)
809
for c in self.server.clients:
810
if c.fingerprint == fpr:
811
client = c
812
break
813
else:
814
ipc.write(u"NOTFOUND %s %s\n"
815
% (fpr, unicode(self.client_address)))
816
session.bye()
817
return
818
# Have to check if client.still_valid(), since it is
819
# possible that the client timed out while establishing
820
# the GnuTLS session.
821
if not client.still_valid():
822
ipc.write(u"INVALID %s\n" % client.name)
823
session.bye()
824
return
825
ipc.write(u"SENDING %s\n" % client.name)
826
sent_size = 0
827
while sent_size < len(client.secret):
828
sent = session.send(client.secret[sent_size:])
829
logger.debug(u"Sent: %d, remaining: %d",
830
sent, len(client.secret)
831
- (sent_size + sent))
832
sent_size += sent
833
session.bye()
1824
834
1825
835
@staticmethod
1826
836
def peer_certificate(session):
1836
846
.gnutls_certificate_get_peers
1837
847
(session._c_object, ctypes.byref(list_size)))
1838
848
if not bool(cert_list) and list_size.value != 0:
1839
raise gnutls.errors.GNUTLSError("error getting peer"
1840
" certificate")
849
raise gnutls.errors.GNUTLSError(u"error getting peer"
850
u" certificate")
1841
851
if list_size.value == 0:
1842
852
return None
1843
853
cert = cert_list[0]
1869
879
if crtverify.value != 0:
1870
880
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1871
881
raise (gnutls.errors.CertificateSecurityError
1872
("Verify failed"))
882
(u"Verify failed"))
1873
883
# New buffer for the fingerprint
1874
884
buf = ctypes.create_string_buffer(20)
1875
885
buf_len = ctypes.c_size_t()
1882
892
# Convert the buffer to a Python bytestring
1883
893
fpr = ctypes.string_at(buf, buf_len.value)
1884
894
# Convert the bytestring to hexadecimal notation
1885
hex_fpr = binascii.hexlify(fpr).upper()
895
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1886
896
return hex_fpr
1887
897
1888
898
1889
class MultiprocessingMixIn(object):
1890
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1891
def sub_process_main(self, request, address):
1892
try:
1893
self.finish_request(request, address)
1894
except Exception:
1895
self.handle_error(request, address)
1896
self.close_request(request)
1897
1898
def process_request(self, request, address):
1899
"""Start a new process to process the request."""
1900
proc = multiprocessing.Process(target = self.sub_process_main,
1901
args = (request, address))
1902
proc.start()
1903
return proc
1904
1905
1906
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1907
""" adds a pipe to the MixIn """
899
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
900
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1908
901
def process_request(self, request, client_address):
1909
902
"""Overrides and wraps the original process_request().
1910
903
1911
904
This function creates a new pipe in self.pipe
1912
905
"""
1913
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1914
1915
proc = MultiprocessingMixIn.process_request(self, request,
1916
client_address)
1917
self.child_pipe.close()
1918
self.add_pipe(parent_pipe, proc)
1919
1920
def add_pipe(self, parent_pipe, proc):
906
self.pipe = os.pipe()
907
super(ForkingMixInWithPipe,
908
self).process_request(request, client_address)
909
os.close(self.pipe[1]) # close write end
910
self.add_pipe(self.pipe[0])
911
def add_pipe(self, pipe):
1921
912
"""Dummy function; override as necessary"""
1922
raise NotImplementedError()
1923
1924
1925
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
913
os.close(pipe)
914
915
916
class IPv6_TCPServer(ForkingMixInWithPipe,
1926
917
socketserver.TCPServer, object):
1927
918
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1928
919
1932
923
use_ipv6: Boolean; to use IPv6 or not
1933
924
"""
1934
925
def __init__(self, server_address, RequestHandlerClass,
1935
interface=None, use_ipv6=True, socketfd=None):
1936
"""If socketfd is set, use that file descriptor instead of
1937
creating a new one with socket.socket().
1938
"""
926
interface=None, use_ipv6=True):
1939
927
self.interface = interface
1940
928
if use_ipv6:
1941
929
self.address_family = socket.AF_INET6
1942
if socketfd is not None:
1943
# Save the file descriptor
1944
self.socketfd = socketfd
1945
# Save the original socket.socket() function
1946
self.socket_socket = socket.socket
1947
# To implement --socket, we monkey patch socket.socket.
1948
#
1949
# (When socketserver.TCPServer is a new-style class, we
1950
# could make self.socket into a property instead of monkey
1951
# patching socket.socket.)
1952
#
1953
# Create a one-time-only replacement for socket.socket()
1954
@functools.wraps(socket.socket)
1955
def socket_wrapper(*args, **kwargs):
1956
# Restore original function so subsequent calls are
1957
# not affected.
1958
socket.socket = self.socket_socket
1959
del self.socket_socket
1960
# This time only, return a new socket object from the
1961
# saved file descriptor.
1962
return socket.fromfd(self.socketfd, *args, **kwargs)
1963
# Replace socket.socket() function with wrapper
1964
socket.socket = socket_wrapper
1965
# The socketserver.TCPServer.__init__ will call
1966
# socket.socket(), which might be our replacement,
1967
# socket_wrapper(), if socketfd was set.
1968
930
socketserver.TCPServer.__init__(self, server_address,
1969
931
RequestHandlerClass)
1970
1971
932
def server_bind(self):
1972
933
"""This overrides the normal server_bind() function
1973
934
to bind to an interface if one was specified, and also NOT to
1974
935
bind to an address or port if they were not specified."""
1975
936
if self.interface is not None:
1976
937
if SO_BINDTODEVICE is None:
1977
logger.error("SO_BINDTODEVICE does not exist;"
1978
" cannot bind to interface %s",
938
logger.error(u"SO_BINDTODEVICE does not exist;"
939
u" cannot bind to interface %s",
1979
940
self.interface)
1980
941
else:
1981
942
try:
1982
943
self.socket.setsockopt(socket.SOL_SOCKET,
1983
944
SO_BINDTODEVICE,
1984
(self.interface + "\0")
1985
.encode("utf-8"))
1986
except socket.error as error:
1987
if error.errno == errno.EPERM:
1988
logger.error("No permission to bind to"
1989
" interface %s", self.interface)
1990
elif error.errno == errno.ENOPROTOOPT:
1991
logger.error("SO_BINDTODEVICE not available;"
1992
" cannot bind to interface %s",
1993
self.interface)
1994
elif error.errno == errno.ENODEV:
1995
logger.error("Interface %s does not exist,"
1996
" cannot bind", self.interface)
945
str(self.interface
946
+ u'\0'))
947
except socket.error, error:
948
if error[0] == errno.EPERM:
949
logger.error(u"No permission to"
950
u" bind to interface %s",
951
self.interface)
952
elif error[0] == errno.ENOPROTOOPT:
953
logger.error(u"SO_BINDTODEVICE not available;"
954
u" cannot bind to interface %s",
955
self.interface)
1997
956
else:
1998
957
raise
1999
958
# Only bind(2) the socket if we really need to.
2000
959
if self.server_address[0] or self.server_address[1]:
2001
960
if not self.server_address[0]:
2002
961
if self.address_family == socket.AF_INET6:
2003
any_address = "::" # in6addr_any
962
any_address = u"::" # in6addr_any
2004
963
else:
2005
any_address = "0.0.0.0" # INADDR_ANY
964
any_address = socket.INADDR_ANY
2006
965
self.server_address = (any_address,
2007
966
self.server_address[1])
2008
967
elif not self.server_address[1]:
2024
983
clients: set of Client objects
2025
984
gnutls_priority GnuTLS priority string
2026
985
use_dbus: Boolean; to emit D-Bus signals or not
986
clients: set of Client objects
987
gnutls_priority GnuTLS priority string
988
use_dbus: Boolean; to emit D-Bus signals or not
2027
989
2028
990
Assumes a gobject.MainLoop event loop.
2029
991
"""
2030
992
def __init__(self, server_address, RequestHandlerClass,
2031
993
interface=None, use_ipv6=True, clients=None,
2032
gnutls_priority=None, use_dbus=True, socketfd=None):
994
gnutls_priority=None, use_dbus=True):
2033
995
self.enabled = False
2034
996
self.clients = clients
2035
997
if self.clients is None:
2036
self.clients = {}
998
self.clients = set()
2037
999
self.use_dbus = use_dbus
2038
1000
self.gnutls_priority = gnutls_priority
2039
1001
IPv6_TCPServer.__init__(self, server_address,
2040
1002
RequestHandlerClass,
2041
1003
interface = interface,
2042
use_ipv6 = use_ipv6,
2043
socketfd = socketfd)
1004
use_ipv6 = use_ipv6)
2044
1005
def server_activate(self):
2045
1006
if self.enabled:
2046
1007
return socketserver.TCPServer.server_activate(self)
2047
2048
1008
def enable(self):
2049
1009
self.enabled = True
2050
2051
def add_pipe(self, parent_pipe, proc):
1010
def add_pipe(self, pipe):
2052
1011
# Call "handle_ipc" for both data and EOF events
2053
gobject.io_add_watch(parent_pipe.fileno(),
2054
gobject.IO_IN | gobject.IO_HUP,
2055
functools.partial(self.handle_ipc,
2056
parent_pipe =
2057
parent_pipe,
2058
proc = proc))
2059
2060
def handle_ipc(self, source, condition, parent_pipe=None,
2061
proc = None, client_object=None):
2062
# error, or the other end of multiprocessing.Pipe has closed
2063
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2064
# Wait for other process to exit
2065
proc.join()
2066
return False
2067
2068
# Read a request from the child
2069
request = parent_pipe.recv()
2070
command = request[0]
2071
2072
if command == 'init':
2073
fpr = request[1]
2074
address = request[2]
2075
2076
for c in self.clients.itervalues():
2077
if c.fingerprint == fpr:
2078
client = c
2079
break
2080
else:
2081
logger.info("Client not found for fingerprint: %s, ad"
2082
"dress: %s", fpr, address)
2083
if self.use_dbus:
2084
# Emit D-Bus signal
2085
mandos_dbus_service.ClientNotFound(fpr,
2086
address[0])
2087
parent_pipe.send(False)
2088
return False
2089
2090
gobject.io_add_watch(parent_pipe.fileno(),
2091
gobject.IO_IN | gobject.IO_HUP,
2092
functools.partial(self.handle_ipc,
2093
parent_pipe =
2094
parent_pipe,
2095
proc = proc,
2096
client_object =
2097
client))
2098
parent_pipe.send(True)
2099
# remove the old hook in favor of the new above hook on
2100
# same fileno
2101
return False
2102
if command == 'funcall':
2103
funcname = request[1]
2104
args = request[2]
2105
kwargs = request[3]
2106
2107
parent_pipe.send(('data', getattr(client_object,
2108
funcname)(*args,
2109
**kwargs)))
2110
2111
if command == 'getattr':
2112
attrname = request[1]
2113
if callable(client_object.__getattribute__(attrname)):
2114
parent_pipe.send(('function',))
2115
else:
2116
parent_pipe.send(('data', client_object
2117
.__getattribute__(attrname)))
2118
2119
if command == 'setattr':
2120
attrname = request[1]
2121
value = request[2]
2122
setattr(client_object, attrname, value)
2123
1012
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1013
self.handle_ipc)
1014
def handle_ipc(self, source, condition, file_objects={}):
1015
condition_names = {
1016
gobject.IO_IN: u"IN", # There is data to read.
1017
gobject.IO_OUT: u"OUT", # Data can be written (without
1018
# blocking).
1019
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1020
gobject.IO_ERR: u"ERR", # Error condition.
1021
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1022
# broken, usually for pipes and
1023
# sockets).
1024
}
1025
conditions_string = ' | '.join(name
1026
for cond, name in
1027
condition_names.iteritems()
1028
if cond & condition)
1029
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1030
conditions_string)
1031
1032
# Turn the pipe file descriptor into a Python file object
1033
if source not in file_objects:
1034
file_objects[source] = os.fdopen(source, u"r", 1)
1035
1036
# Read a line from the file object
1037
cmdline = file_objects[source].readline()
1038
if not cmdline: # Empty line means end of file
1039
# close the IPC pipe
1040
file_objects[source].close()
1041
del file_objects[source]
1042
1043
# Stop calling this function
1044
return False
1045
1046
logger.debug(u"IPC command: %r", cmdline)
1047
1048
# Parse and act on command
1049
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1050
1051
if cmd == u"NOTFOUND":
1052
logger.warning(u"Client not found for fingerprint: %s",
1053
args)
1054
if self.use_dbus:
1055
# Emit D-Bus signal
1056
mandos_dbus_service.ClientNotFound(args)
1057
elif cmd == u"INVALID":
1058
for client in self.clients:
1059
if client.name == args:
1060
logger.warning(u"Client %s is invalid", args)
1061
if self.use_dbus:
1062
# Emit D-Bus signal
1063
client.Rejected()
1064
break
1065
else:
1066
logger.error(u"Unknown client %s is invalid", args)
1067
elif cmd == u"SENDING":
1068
for client in self.clients:
1069
if client.name == args:
1070
logger.info(u"Sending secret to %s", client.name)
1071
client.checked_ok()
1072
if self.use_dbus:
1073
# Emit D-Bus signal
1074
client.ReceivedSecret()
1075
break
1076
else:
1077
logger.error(u"Sending secret to unknown client %s",
1078
args)
1079
else:
1080
logger.error(u"Unknown IPC command: %r", cmdline)
1081
1082
# Keep calling this function
2124
1083
return True
2125
1084
2126
1085
2127
def rfc3339_duration_to_delta(duration):
2128
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2129
2130
>>> rfc3339_duration_to_delta("P7D")
2131
datetime.timedelta(7)
2132
>>> rfc3339_duration_to_delta("PT60S")
2133
datetime.timedelta(0, 60)
2134
>>> rfc3339_duration_to_delta("PT60M")
2135
datetime.timedelta(0, 3600)
2136
>>> rfc3339_duration_to_delta("PT24H")
2137
datetime.timedelta(1)
2138
>>> rfc3339_duration_to_delta("P1W")
2139
datetime.timedelta(7)
2140
>>> rfc3339_duration_to_delta("PT5M30S")
2141
datetime.timedelta(0, 330)
2142
>>> rfc3339_duration_to_delta("P1DT3M20S")
2143
datetime.timedelta(1, 200)
2144
"""
2145
2146
# Parsing an RFC 3339 duration with regular expressions is not
2147
# possible - there would have to be multiple places for the same
2148
# values, like seconds. The current code, while more esoteric, is
2149
# cleaner without depending on a parsing library. If Python had a
2150
# built-in library for parsing we would use it, but we'd like to
2151
# avoid excessive use of external libraries.
2152
2153
# New type for defining tokens, syntax, and semantics all-in-one
2154
Token = collections.namedtuple("Token",
2155
("regexp", # To match token; if
2156
# "value" is not None,
2157
# must have a "group"
2158
# containing digits
2159
"value", # datetime.timedelta or
2160
# None
2161
"followers")) # Tokens valid after
2162
# this token
2163
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2164
# the "duration" ABNF definition in RFC 3339, Appendix A.
2165
token_end = Token(re.compile(r"$"), None, frozenset())
2166
token_second = Token(re.compile(r"(\d+)S"),
2167
datetime.timedelta(seconds=1),
2168
frozenset((token_end,)))
2169
token_minute = Token(re.compile(r"(\d+)M"),
2170
datetime.timedelta(minutes=1),
2171
frozenset((token_second, token_end)))
2172
token_hour = Token(re.compile(r"(\d+)H"),
2173
datetime.timedelta(hours=1),
2174
frozenset((token_minute, token_end)))
2175
token_time = Token(re.compile(r"T"),
2176
None,
2177
frozenset((token_hour, token_minute,
2178
token_second)))
2179
token_day = Token(re.compile(r"(\d+)D"),
2180
datetime.timedelta(days=1),
2181
frozenset((token_time, token_end)))
2182
token_month = Token(re.compile(r"(\d+)M"),
2183
datetime.timedelta(weeks=4),
2184
frozenset((token_day, token_end)))
2185
token_year = Token(re.compile(r"(\d+)Y"),
2186
datetime.timedelta(weeks=52),
2187
frozenset((token_month, token_end)))
2188
token_week = Token(re.compile(r"(\d+)W"),
2189
datetime.timedelta(weeks=1),
2190
frozenset((token_end,)))
2191
token_duration = Token(re.compile(r"P"), None,
2192
frozenset((token_year, token_month,
2193
token_day, token_time,
2194
token_week)))
2195
# Define starting values
2196
value = datetime.timedelta() # Value so far
2197
found_token = None
2198
followers = frozenset((token_duration,)) # Following valid tokens
2199
s = duration # String left to parse
2200
# Loop until end token is found
2201
while found_token is not token_end:
2202
# Search for any currently valid tokens
2203
for token in followers:
2204
match = token.regexp.match(s)
2205
if match is not None:
2206
# Token found
2207
if token.value is not None:
2208
# Value found, parse digits
2209
factor = int(match.group(1), 10)
2210
# Add to value so far
2211
value += factor * token.value
2212
# Strip token from string
2213
s = token.regexp.sub("", s, 1)
2214
# Go to found token
2215
found_token = token
2216
# Set valid next tokens
2217
followers = found_token.followers
2218
break
2219
else:
2220
# No currently valid tokens were found
2221
raise ValueError("Invalid RFC 3339 duration")
2222
# End token found
2223
return value
2224
2225
2226
1086
def string_to_delta(interval):
2227
1087
"""Parse a string and return a datetime.timedelta
2228
1088
2229
>>> string_to_delta('7d')
1089
>>> string_to_delta(u'7d')
2230
1090
datetime.timedelta(7)
2231
>>> string_to_delta('60s')
1091
>>> string_to_delta(u'60s')
2232
1092
datetime.timedelta(0, 60)
2233
>>> string_to_delta('60m')
1093
>>> string_to_delta(u'60m')
2234
1094
datetime.timedelta(0, 3600)
2235
>>> string_to_delta('24h')
1095
>>> string_to_delta(u'24h')
2236
1096
datetime.timedelta(1)
2237
>>> string_to_delta('1w')
1097
>>> string_to_delta(u'1w')
2238
1098
datetime.timedelta(7)
2239
>>> string_to_delta('5m 30s')
1099
>>> string_to_delta(u'5m 30s')
2240
1100
datetime.timedelta(0, 330)
2241
1101
"""
2242
2243
try:
2244
return rfc3339_duration_to_delta(interval)
2245
except ValueError:
2246
pass
2247
2248
1102
timevalue = datetime.timedelta(0)
2249
1103
for s in interval.split():
2250
1104
try:
2251
suffix = s[-1]
1105
suffix = unicode(s[-1])
2252
1106
value = int(s[:-1])
2253
if suffix == "d":
1107
if suffix == u"d":
2254
1108
delta = datetime.timedelta(value)
2255
elif suffix == "s":
1109
elif suffix == u"s":
2256
1110
delta = datetime.timedelta(0, value)
2257
elif suffix == "m":
1111
elif suffix == u"m":
2258
1112
delta = datetime.timedelta(0, 0, 0, 0, value)
2259
elif suffix == "h":
1113
elif suffix == u"h":
2260
1114
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2261
elif suffix == "w":
1115
elif suffix == u"w":
2262
1116
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2263
1117
else:
2264
raise ValueError("Unknown suffix {!r}"
2265
.format(suffix))
2266
except IndexError as e:
2267
raise ValueError(*(e.args))
1118
raise ValueError
1119
except (ValueError, IndexError):
1120
raise ValueError
2268
1121
timevalue += delta
2269
1122
return timevalue
2270
1123
2271
1124
1125
def if_nametoindex(interface):
1126
"""Call the C function if_nametoindex(), or equivalent
1127
1128
Note: This function cannot accept a unicode string."""
1129
global if_nametoindex
1130
try:
1131
if_nametoindex = (ctypes.cdll.LoadLibrary
1132
(ctypes.util.find_library(u"c"))
1133
.if_nametoindex)
1134
except (OSError, AttributeError):
1135
logger.warning(u"Doing if_nametoindex the hard way")
1136
def if_nametoindex(interface):
1137
"Get an interface index the hard way, i.e. using fcntl()"
1138
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1139
with closing(socket.socket()) as s:
1140
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1141
struct.pack(str(u"16s16x"),
1142
interface))
1143
interface_index = struct.unpack(str(u"I"),
1144
ifreq[16:20])[0]
1145
return interface_index
1146
return if_nametoindex(interface)
1147
1148
2272
1149
def daemon(nochdir = False, noclose = False):
2273
1150
"""See daemon(3). Standard BSD Unix function.
2274
1151
2277
1154
sys.exit()
2278
1155
os.setsid()
2279
1156
if not nochdir:
2280
os.chdir("/")
1157
os.chdir(u"/")
2281
1158
if os.fork():
2282
1159
sys.exit()
2283
1160
if not noclose:
2284
1161
# Close all standard open file descriptors
2285
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1162
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2286
1163
if not stat.S_ISCHR(os.fstat(null).st_mode):
2287
raise OSError(errno.ENODEV, "{} not a character device"
2288
.format(os.devnull))
1164
raise OSError(errno.ENODEV,
1165
u"/dev/null not a character device")
2289
1166
os.dup2(null, sys.stdin.fileno())
2290
1167
os.dup2(null, sys.stdout.fileno())
2291
1168
os.dup2(null, sys.stderr.fileno())
2295
1172
2296
1173
def main():
2297
1174
2298
##################################################################
1175
######################################################################
2299
1176
# Parsing of options, both command line and config file
2300
1177
2301
parser = argparse.ArgumentParser()
2302
parser.add_argument("-v", "--version", action="version",
2303
version = "%(prog)s {}".format(version),
2304
help="show version number and exit")
2305
parser.add_argument("-i", "--interface", metavar="IF",
2306
help="Bind to interface IF")
2307
parser.add_argument("-a", "--address",
2308
help="Address to listen for requests on")
2309
parser.add_argument("-p", "--port", type=int,
2310
help="Port number to receive requests on")
2311
parser.add_argument("--check", action="store_true",
2312
help="Run self-test")
2313
parser.add_argument("--debug", action="store_true",
2314
help="Debug mode; run in foreground and log"
2315
" to terminal", default=None)
2316
parser.add_argument("--debuglevel", metavar="LEVEL",
2317
help="Debug level for stdout output")
2318
parser.add_argument("--priority", help="GnuTLS"
2319
" priority string (see GnuTLS documentation)")
2320
parser.add_argument("--servicename",
2321
metavar="NAME", help="Zeroconf service name")
2322
parser.add_argument("--configdir",
2323
default="/etc/mandos", metavar="DIR",
2324
help="Directory to search for configuration"
2325
" files")
2326
parser.add_argument("--no-dbus", action="store_false",
2327
dest="use_dbus", help="Do not provide D-Bus"
2328
" system bus interface", default=None)
2329
parser.add_argument("--no-ipv6", action="store_false",
2330
dest="use_ipv6", help="Do not use IPv6",
2331
default=None)
2332
parser.add_argument("--no-restore", action="store_false",
2333
dest="restore", help="Do not restore stored"
2334
" state", default=None)
2335
parser.add_argument("--socket", type=int,
2336
help="Specify a file descriptor to a network"
2337
" socket to use instead of creating one")
2338
parser.add_argument("--statedir", metavar="DIR",
2339
help="Directory to save/restore state in")
2340
parser.add_argument("--foreground", action="store_true",
2341
help="Run in foreground", default=None)
2342
parser.add_argument("--no-zeroconf", action="store_false",
2343
dest="zeroconf", help="Do not use Zeroconf",
2344
default=None)
2345
2346
options = parser.parse_args()
1178
parser = optparse.OptionParser(version = "%%prog %s" % version)
1179
parser.add_option("-i", u"--interface", type=u"string",
1180
metavar="IF", help=u"Bind to interface IF")
1181
parser.add_option("-a", u"--address", type=u"string",
1182
help=u"Address to listen for requests on")
1183
parser.add_option("-p", u"--port", type=u"int",
1184
help=u"Port number to receive requests on")
1185
parser.add_option("--check", action=u"store_true",
1186
help=u"Run self-test")
1187
parser.add_option("--debug", action=u"store_true",
1188
help=u"Debug mode; run in foreground and log to"
1189
u" terminal")
1190
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1191
u" priority string (see GnuTLS documentation)")
1192
parser.add_option("--servicename", type=u"string",
1193
metavar=u"NAME", help=u"Zeroconf service name")
1194
parser.add_option("--configdir", type=u"string",
1195
default=u"/etc/mandos", metavar=u"DIR",
1196
help=u"Directory to search for configuration"
1197
u" files")
1198
parser.add_option("--no-dbus", action=u"store_false",
1199
dest=u"use_dbus", help=u"Do not provide D-Bus"
1200
u" system bus interface")
1201
parser.add_option("--no-ipv6", action=u"store_false",
1202
dest=u"use_ipv6", help=u"Do not use IPv6")
1203
options = parser.parse_args()[0]
2347
1204
2348
1205
if options.check:
2349
1206
import doctest
2350
fail_count, test_count = doctest.testmod()
2351
sys.exit(os.EX_OK if fail_count == 0 else 1)
1207
doctest.testmod()
1208
sys.exit()
2352
1209
2353
1210
# Default values for config file for server-global settings
2354
server_defaults = { "interface": "",
2355
"address": "",
2356
"port": "",
2357
"debug": "False",
2358
"priority":
2359
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2360
"servicename": "Mandos",
2361
"use_dbus": "True",
2362
"use_ipv6": "True",
2363
"debuglevel": "",
2364
"restore": "True",
2365
"socket": "",
2366
"statedir": "/var/lib/mandos",
2367
"foreground": "False",
2368
"zeroconf": "True",
1211
server_defaults = { u"interface": u"",
1212
u"address": u"",
1213
u"port": u"",
1214
u"debug": u"False",
1215
u"priority":
1216
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1217
u"servicename": u"Mandos",
1218
u"use_dbus": u"True",
1219
u"use_ipv6": u"True",
2369
1220
}
2370
1221
2371
1222
# Parse config file for server-global settings
2372
1223
server_config = configparser.SafeConfigParser(server_defaults)
2373
1224
del server_defaults
2374
1225
server_config.read(os.path.join(options.configdir,
2375
"mandos.conf"))
1226
u"mandos.conf"))
2376
1227
# Convert the SafeConfigParser object to a dict
2377
1228
server_settings = server_config.defaults()
2378
1229
# Use the appropriate methods on the non-string config options
2379
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2380
server_settings[option] = server_config.getboolean("DEFAULT",
1230
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1231
server_settings[option] = server_config.getboolean(u"DEFAULT",
2381
1232
option)
2382
1233
if server_settings["port"]:
2383
server_settings["port"] = server_config.getint("DEFAULT",
2384
"port")
2385
if server_settings["socket"]:
2386
server_settings["socket"] = server_config.getint("DEFAULT",
2387
"socket")
2388
# Later, stdin will, and stdout and stderr might, be dup'ed
2389
# over with an opened os.devnull. But we don't want this to
2390
# happen with a supplied network socket.
2391
if 0 <= server_settings["socket"] <= 2:
2392
server_settings["socket"] = os.dup(server_settings
2393
["socket"])
1234
server_settings["port"] = server_config.getint(u"DEFAULT",
1235
u"port")
2394
1236
del server_config
2395
1237
2396
1238
# Override the settings from the config file with command line
2397
1239
# options, if set.
2398
for option in ("interface", "address", "port", "debug",
2399
"priority", "servicename", "configdir",
2400
"use_dbus", "use_ipv6", "debuglevel", "restore",
2401
"statedir", "socket", "foreground", "zeroconf"):
1240
for option in (u"interface", u"address", u"port", u"debug",
1241
u"priority", u"servicename", u"configdir",
1242
u"use_dbus", u"use_ipv6"):
2402
1243
value = getattr(options, option)
2403
1244
if value is not None:
2404
1245
server_settings[option] = value
2405
1246
del options
2406
1247
# Force all strings to be unicode
2407
1248
for option in server_settings.keys():
2408
if isinstance(server_settings[option], bytes):
2409
server_settings[option] = (server_settings[option]
2410
.decode("utf-8"))
2411
# Force all boolean options to be boolean
2412
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2413
"foreground", "zeroconf"):
2414
server_settings[option] = bool(server_settings[option])
2415
# Debug implies foreground
2416
if server_settings["debug"]:
2417
server_settings["foreground"] = True
1249
if type(server_settings[option]) is str:
1250
server_settings[option] = unicode(server_settings[option])
2418
1251
# Now we have our good server settings in "server_settings"
2419
1252
2420
1253
##################################################################
2421
1254
2422
if (not server_settings["zeroconf"] and
2423
not (server_settings["port"]
2424
or server_settings["socket"] != "")):
2425
parser.error("Needs port or socket to work without"
2426
" Zeroconf")
2427
2428
1255
# For convenience
2429
debug = server_settings["debug"]
2430
debuglevel = server_settings["debuglevel"]
2431
use_dbus = server_settings["use_dbus"]
2432
use_ipv6 = server_settings["use_ipv6"]
2433
stored_state_path = os.path.join(server_settings["statedir"],
2434
stored_state_file)
2435
foreground = server_settings["foreground"]
2436
zeroconf = server_settings["zeroconf"]
2437
2438
if debug:
2439
initlogger(debug, logging.DEBUG)
2440
else:
2441
if not debuglevel:
2442
initlogger(debug)
2443
else:
2444
level = getattr(logging, debuglevel.upper())
2445
initlogger(debug, level)
2446
2447
if server_settings["servicename"] != "Mandos":
1256
debug = server_settings[u"debug"]
1257
use_dbus = server_settings[u"use_dbus"]
1258
use_ipv6 = server_settings[u"use_ipv6"]
1259
1260
if not debug:
1261
syslogger.setLevel(logging.WARNING)
1262
console.setLevel(logging.WARNING)
1263
1264
if server_settings[u"servicename"] != u"Mandos":
2448
1265
syslogger.setFormatter(logging.Formatter
2449
('Mandos ({}) [%(process)d]:'
2450
' %(levelname)s: %(message)s'
2451
.format(server_settings
2452
["servicename"])))
1266
(u'Mandos (%s) [%%(process)d]:'
1267
u' %%(levelname)s: %%(message)s'
1268
% server_settings[u"servicename"]))
2453
1269
2454
1270
# Parse config file with clients
2455
client_config = configparser.SafeConfigParser(Client
2456
.client_defaults)
2457
client_config.read(os.path.join(server_settings["configdir"],
2458
"clients.conf"))
1271
client_defaults = { u"timeout": u"1h",
1272
u"interval": u"5m",
1273
u"checker": u"fping -q -- %%(host)s",
1274
u"host": u"",
1275
}
1276
client_config = configparser.SafeConfigParser(client_defaults)
1277
client_config.read(os.path.join(server_settings[u"configdir"],
1278
u"clients.conf"))
2459
1279
2460
1280
global mandos_dbus_service
2461
1281
mandos_dbus_service = None
2462
1282
2463
socketfd = None
2464
if server_settings["socket"] != "":
2465
socketfd = server_settings["socket"]
2466
tcp_server = MandosServer((server_settings["address"],
2467
server_settings["port"]),
1283
tcp_server = MandosServer((server_settings[u"address"],
1284
server_settings[u"port"]),
2468
1285
ClientHandler,
2469
interface=(server_settings["interface"]
2470
or None),
1286
interface=server_settings[u"interface"],
2471
1287
use_ipv6=use_ipv6,
2472
1288
gnutls_priority=
2473
server_settings["priority"],
2474
use_dbus=use_dbus,
2475
socketfd=socketfd)
2476
if not foreground:
2477
pidfilename = "/run/mandos.pid"
2478
if not os.path.isdir("/run/."):
2479
pidfilename = "/var/run/mandos.pid"
2480
pidfile = None
2481
try:
2482
pidfile = open(pidfilename, "w")
2483
except IOError as e:
2484
logger.error("Could not open file %r", pidfilename,
2485
exc_info=e)
1289
server_settings[u"priority"],
1290
use_dbus=use_dbus)
1291
pidfilename = u"/var/run/mandos.pid"
1292
try:
1293
pidfile = open(pidfilename, u"w")
1294
except IOError:
1295
logger.error(u"Could not open file %r", pidfilename)
2486
1296
2487
for name in ("_mandos", "mandos", "nobody"):
1297
try:
1298
uid = pwd.getpwnam(u"_mandos").pw_uid
1299
gid = pwd.getpwnam(u"_mandos").pw_gid
1300
except KeyError:
2488
1301
try:
2489
uid = pwd.getpwnam(name).pw_uid
2490
gid = pwd.getpwnam(name).pw_gid
2491
break
1302
uid = pwd.getpwnam(u"mandos").pw_uid
1303
gid = pwd.getpwnam(u"mandos").pw_gid
2492
1304
except KeyError:
2493
continue
2494
else:
2495
uid = 65534
2496
gid = 65534
1305
try:
1306
uid = pwd.getpwnam(u"nobody").pw_uid
1307
gid = pwd.getpwnam(u"nobody").pw_gid
1308
except KeyError:
1309
uid = 65534
1310
gid = 65534
2497
1311
try:
2498
1312
os.setgid(gid)
2499
1313
os.setuid(uid)
2500
except OSError as error:
2501
if error.errno != errno.EPERM:
2502
raise
1314
except OSError, error:
1315
if error[0] != errno.EPERM:
1316
raise error
2503
1317
1318
# Enable all possible GnuTLS debugging
2504
1319
if debug:
2505
# Enable all possible GnuTLS debugging
2506
2507
1320
# "Use a log level over 10 to enable all debugging options."
2508
1321
# - GnuTLS manual
2509
1322
gnutls.library.functions.gnutls_global_set_log_level(11)
2510
1323
2511
1324
@gnutls.library.types.gnutls_log_func
2512
1325
def debug_gnutls(level, string):
2513
logger.debug("GnuTLS: %s", string[:-1])
1326
logger.debug(u"GnuTLS: %s", string[:-1])
2514
1327
2515
1328
(gnutls.library.functions
2516
1329
.gnutls_global_set_log_function(debug_gnutls))
2517
2518
# Redirect stdin so all checkers get /dev/null
2519
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2520
os.dup2(null, sys.stdin.fileno())
2521
if null > 2:
2522
os.close(null)
2523
2524
# Need to fork before connecting to D-Bus
2525
if not foreground:
2526
# Close all input and output, do double fork, etc.
2527
daemon()
2528
2529
# multiprocessing will use threads, so before we use gobject we
2530
# need to inform gobject that threads will be used.
2531
gobject.threads_init()
2532
1330
2533
1331
global main_loop
2534
1332
# From the Avahi example code
2535
DBusGMainLoop(set_as_default=True)
1333
DBusGMainLoop(set_as_default=True )
2536
1334
main_loop = gobject.MainLoop()
2537
1335
bus = dbus.SystemBus()
2538
1336
# End of Avahi example code
2539
1337
if use_dbus:
2540
try:
2541
bus_name = dbus.service.BusName("se.recompile.Mandos",
2542
bus, do_not_queue=True)
2543
old_bus_name = (dbus.service.BusName
2544
("se.bsnet.fukt.Mandos", bus,
2545
do_not_queue=True))
2546
except dbus.exceptions.NameExistsException as e:
2547
logger.error("Disabling D-Bus:", exc_info=e)
2548
use_dbus = False
2549
server_settings["use_dbus"] = False
2550
tcp_server.use_dbus = False
2551
if zeroconf:
2552
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2553
service = AvahiServiceToSyslog(name =
2554
server_settings["servicename"],
2555
servicetype = "_mandos._tcp",
2556
protocol = protocol, bus = bus)
2557
if server_settings["interface"]:
2558
service.interface = (if_nametoindex
2559
(server_settings["interface"]
2560
.encode("utf-8")))
2561
2562
global multiprocessing_manager
2563
multiprocessing_manager = multiprocessing.Manager()
1338
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1339
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1340
service = AvahiService(name = server_settings[u"servicename"],
1341
servicetype = u"_mandos._tcp",
1342
protocol = protocol, bus = bus)
1343
if server_settings["interface"]:
1344
service.interface = (if_nametoindex
1345
(str(server_settings[u"interface"])))
2564
1346
2565
1347
client_class = Client
2566
1348
if use_dbus:
2567
1349
client_class = functools.partial(ClientDBus, bus = bus)
2568
2569
client_settings = Client.config_parser(client_config)
2570
old_client_settings = {}
2571
clients_data = {}
2572
2573
# This is used to redirect stdout and stderr for checker processes
2574
global wnull
2575
wnull = open(os.devnull, "w") # A writable /dev/null
2576
# Only used if server is running in foreground but not in debug
2577
# mode
2578
if debug or not foreground:
2579
wnull.close()
2580
2581
# Get client data and settings from last running state.
2582
if server_settings["restore"]:
2583
try:
2584
with open(stored_state_path, "rb") as stored_state:
2585
clients_data, old_client_settings = (pickle.load
2586
(stored_state))
2587
os.remove(stored_state_path)
2588
except IOError as e:
2589
if e.errno == errno.ENOENT:
2590
logger.warning("Could not load persistent state: {}"
2591
.format(os.strerror(e.errno)))
2592
else:
2593
logger.critical("Could not load persistent state:",
2594
exc_info=e)
2595
raise
2596
except EOFError as e:
2597
logger.warning("Could not load persistent state: "
2598
"EOFError:", exc_info=e)
2599
2600
with PGPEngine() as pgp:
2601
for client_name, client in clients_data.items():
2602
# Skip removed clients
2603
if client_name not in client_settings:
2604
continue
2605
2606
# Decide which value to use after restoring saved state.
2607
# We have three different values: Old config file,
2608
# new config file, and saved state.
2609
# New config value takes precedence if it differs from old
2610
# config value, otherwise use saved state.
2611
for name, value in client_settings[client_name].items():
2612
try:
2613
# For each value in new config, check if it
2614
# differs from the old config value (Except for
2615
# the "secret" attribute)
2616
if (name != "secret" and
2617
value != old_client_settings[client_name]
2618
[name]):
2619
client[name] = value
2620
except KeyError:
2621
pass
2622
2623
# Clients who has passed its expire date can still be
2624
# enabled if its last checker was successful. Clients
2625
# whose checker succeeded before we stored its state is
2626
# assumed to have successfully run all checkers during
2627
# downtime.
2628
if client["enabled"]:
2629
if datetime.datetime.utcnow() >= client["expires"]:
2630
if not client["last_checked_ok"]:
2631
logger.warning(
2632
"disabling client {} - Client never "
2633
"performed a successful checker"
2634
.format(client_name))
2635
client["enabled"] = False
2636
elif client["last_checker_status"] != 0:
2637
logger.warning(
2638
"disabling client {} - Client last"
2639
" checker failed with error code {}"
2640
.format(client_name,
2641
client["last_checker_status"]))
2642
client["enabled"] = False
2643
else:
2644
client["expires"] = (datetime.datetime
2645
.utcnow()
2646
+ client["timeout"])
2647
logger.debug("Last checker succeeded,"
2648
" keeping {} enabled"
2649
.format(client_name))
2650
try:
2651
client["secret"] = (
2652
pgp.decrypt(client["encrypted_secret"],
2653
client_settings[client_name]
2654
["secret"]))
2655
except PGPError:
2656
# If decryption fails, we use secret from new settings
2657
logger.debug("Failed to decrypt {} old secret"
2658
.format(client_name))
2659
client["secret"] = (
2660
client_settings[client_name]["secret"])
2661
2662
# Add/remove clients based on new changes made to config
2663
for client_name in (set(old_client_settings)
2664
- set(client_settings)):
2665
del clients_data[client_name]
2666
for client_name in (set(client_settings)
2667
- set(old_client_settings)):
2668
clients_data[client_name] = client_settings[client_name]
2669
2670
# Create all client objects
2671
for client_name, client in clients_data.items():
2672
tcp_server.clients[client_name] = client_class(
2673
name = client_name, settings = client,
2674
server_settings = server_settings)
2675
1350
tcp_server.clients.update(set(
1351
client_class(name = section,
1352
config= dict(client_config.items(section)))
1353
for section in client_config.sections()))
2676
1354
if not tcp_server.clients:
2677
logger.warning("No clients defined")
2678
2679
if not foreground:
2680
if pidfile is not None:
2681
try:
2682
with pidfile:
2683
pid = os.getpid()
2684
pidfile.write("{}\n".format(pid).encode("utf-8"))
2685
except IOError:
2686
logger.error("Could not write to file %r with PID %d",
2687
pidfilename, pid)
1355
logger.warning(u"No clients defined")
1356
1357
if debug:
1358
# Redirect stdin so all checkers get /dev/null
1359
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1360
os.dup2(null, sys.stdin.fileno())
1361
if null > 2:
1362
os.close(null)
1363
else:
1364
# No console logging
1365
logger.removeHandler(console)
1366
# Close all input and output, do double fork, etc.
1367
daemon()
1368
1369
try:
1370
with closing(pidfile):
1371
pid = os.getpid()
1372
pidfile.write(str(pid) + "\n")
2688
1373
del pidfile
2689
del pidfilename
2690
1374
except IOError:
1375
logger.error(u"Could not write to file %r with PID %d",
1376
pidfilename, pid)
1377
except NameError:
1378
# "pidfile" was never created
1379
pass
1380
del pidfilename
1381
1382
def cleanup():
1383
"Cleanup function; run on exit"
1384
service.cleanup()
1385
1386
while tcp_server.clients:
1387
client = tcp_server.clients.pop()
1388
client.disable_hook = None
1389
client.disable()
1390
1391
atexit.register(cleanup)
1392
1393
if not debug:
1394
signal.signal(signal.SIGINT, signal.SIG_IGN)
2691
1395
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2692
1396
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2693
1397
2694
1398
if use_dbus:
2695
@alternate_dbus_interfaces({"se.recompile.Mandos":
2696
"se.bsnet.fukt.Mandos"})
2697
class MandosDBusService(DBusObjectWithProperties):
1399
class MandosDBusService(dbus.service.Object):
2698
1400
"""A D-Bus proxy object"""
2699
1401
def __init__(self):
2700
dbus.service.Object.__init__(self, bus, "/")
2701
_interface = "se.recompile.Mandos"
2702
2703
@dbus_interface_annotations(_interface)
2704
def _foo(self):
2705
return { "org.freedesktop.DBus.Property"
2706
".EmitsChangedSignal":
2707
"false"}
2708
2709
@dbus.service.signal(_interface, signature="o")
2710
def ClientAdded(self, objpath):
2711
"D-Bus signal"
2712
pass
2713
2714
@dbus.service.signal(_interface, signature="ss")
2715
def ClientNotFound(self, fingerprint, address):
2716
"D-Bus signal"
2717
pass
2718
2719
@dbus.service.signal(_interface, signature="os")
1402
dbus.service.Object.__init__(self, bus, u"/")
1403
_interface = u"se.bsnet.fukt.Mandos"
1404
1405
@dbus.service.signal(_interface, signature=u"oa{sv}")
1406
def ClientAdded(self, objpath, properties):
1407
"D-Bus signal"
1408
pass
1409
1410
@dbus.service.signal(_interface, signature=u"s")
1411
def ClientNotFound(self, fingerprint):
1412
"D-Bus signal"
1413
pass
1414
1415
@dbus.service.signal(_interface, signature=u"os")
2720
1416
def ClientRemoved(self, objpath, name):
2721
1417
"D-Bus signal"
2722
1418
pass
2723
1419
2724
@dbus.service.method(_interface, out_signature="ao")
1420
@dbus.service.method(_interface, out_signature=u"ao")
2725
1421
def GetAllClients(self):
2726
1422
"D-Bus method"
2727
1423
return dbus.Array(c.dbus_object_path
2728
for c in
2729
tcp_server.clients.itervalues())
1424
for c in tcp_server.clients)
2730
1425
2731
1426
@dbus.service.method(_interface,
2732
out_signature="a{oa{sv}}")
1427
out_signature=u"a{oa{sv}}")
2733
1428
def GetAllClientsWithProperties(self):
2734
1429
"D-Bus method"
2735
1430
return dbus.Dictionary(
2736
{ c.dbus_object_path: c.GetAll("")
2737
for c in tcp_server.clients.itervalues() },
2738
signature="oa{sv}")
1431
((c.dbus_object_path, c.GetAllProperties())
1432
for c in tcp_server.clients),
1433
signature=u"oa{sv}")
2739
1434
2740
@dbus.service.method(_interface, in_signature="o")
1435
@dbus.service.method(_interface, in_signature=u"o")
2741
1436
def RemoveClient(self, object_path):
2742
1437
"D-Bus method"
2743
for c in tcp_server.clients.itervalues():
1438
for c in tcp_server.clients:
2744
1439
if c.dbus_object_path == object_path:
2745
del tcp_server.clients[c.name]
1440
tcp_server.clients.remove(c)
2746
1441
c.remove_from_connection()
2747
1442
# Don't signal anything except ClientRemoved
2748
c.disable(quiet=True)
1443
c.disable(signal=False)
2749
1444
# Emit D-Bus signal
2750
1445
self.ClientRemoved(object_path, c.name)
2751
1446
return
2752
raise KeyError(object_path)
1447
raise KeyError
2753
1448
2754
1449
del _interface
2755
1450
2756
1451
mandos_dbus_service = MandosDBusService()
2757
1452
2758
def cleanup():
2759
"Cleanup function; run on exit"
2760
if zeroconf:
2761
service.cleanup()
2762
2763
multiprocessing.active_children()
2764
wnull.close()
2765
if not (tcp_server.clients or client_settings):
2766
return
2767
2768
# Store client before exiting. Secrets are encrypted with key
2769
# based on what config file has. If config file is
2770
# removed/edited, old secret will thus be unrecovable.
2771
clients = {}
2772
with PGPEngine() as pgp:
2773
for client in tcp_server.clients.itervalues():
2774
key = client_settings[client.name]["secret"]
2775
client.encrypted_secret = pgp.encrypt(client.secret,
2776
key)
2777
client_dict = {}
2778
2779
# A list of attributes that can not be pickled
2780
# + secret.
2781
exclude = { "bus", "changedstate", "secret",
2782
"checker", "server_settings" }
2783
for name, typ in (inspect.getmembers
2784
(dbus.service.Object)):
2785
exclude.add(name)
2786
2787
client_dict["encrypted_secret"] = (client
2788
.encrypted_secret)
2789
for attr in client.client_structure:
2790
if attr not in exclude:
2791
client_dict[attr] = getattr(client, attr)
2792
2793
clients[client.name] = client_dict
2794
del client_settings[client.name]["secret"]
2795
2796
try:
2797
with (tempfile.NamedTemporaryFile
2798
(mode='wb', suffix=".pickle", prefix='clients-',
2799
dir=os.path.dirname(stored_state_path),
2800
delete=False)) as stored_state:
2801
pickle.dump((clients, client_settings), stored_state)
2802
tempname=stored_state.name
2803
os.rename(tempname, stored_state_path)
2804
except (IOError, OSError) as e:
2805
if not debug:
2806
try:
2807
os.remove(tempname)
2808
except NameError:
2809
pass
2810
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2811
logger.warning("Could not save persistent state: {}"
2812
.format(os.strerror(e.errno)))
2813
else:
2814
logger.warning("Could not save persistent state:",
2815
exc_info=e)
2816
raise
2817
2818
# Delete all clients, and settings from config
2819
while tcp_server.clients:
2820
name, client = tcp_server.clients.popitem()
2821
if use_dbus:
2822
client.remove_from_connection()
2823
# Don't signal anything except ClientRemoved
2824
client.disable(quiet=True)
2825
if use_dbus:
2826
# Emit D-Bus signal
2827
mandos_dbus_service.ClientRemoved(client
2828
.dbus_object_path,
2829
client.name)
2830
client_settings.clear()
2831
2832
atexit.register(cleanup)
2833
2834
for client in tcp_server.clients.itervalues():
1453
for client in tcp_server.clients:
2835
1454
if use_dbus:
2836
1455
# Emit D-Bus signal
2837
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2838
# Need to initiate checking of clients
2839
if client.enabled:
2840
client.init_checker()
1456
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1457
client.GetAllProperties())
1458
client.enable()
2841
1459
2842
1460
tcp_server.enable()
2843
1461
tcp_server.server_activate()
2844
1462
2845
1463
# Find out what port we got
2846
if zeroconf:
2847
service.port = tcp_server.socket.getsockname()[1]
1464
service.port = tcp_server.socket.getsockname()[1]
2848
1465
if use_ipv6:
2849
logger.info("Now listening on address %r, port %d,"
2850
" flowinfo %d, scope_id %d",
2851
*tcp_server.socket.getsockname())
1466
logger.info(u"Now listening on address %r, port %d,"
1467
" flowinfo %d, scope_id %d"
1468
% tcp_server.socket.getsockname())
2852
1469
else: # IPv4
2853
logger.info("Now listening on address %r, port %d",
2854
*tcp_server.socket.getsockname())
1470
logger.info(u"Now listening on address %r, port %d"
1471
% tcp_server.socket.getsockname())
2855
1472
2856
1473
#service.interface = tcp_server.socket.getsockname()[3]
2857
1474
2858
1475
try:
2859
if zeroconf:
2860
# From the Avahi example code
2861
try:
2862
service.activate()
2863
except dbus.exceptions.DBusException as error:
2864
logger.critical("D-Bus Exception", exc_info=error)
2865
cleanup()
2866
sys.exit(1)
2867
# End of Avahi example code
1476
# From the Avahi example code
1477
try:
1478
service.activate()
1479
except dbus.exceptions.DBusException, error:
1480
logger.critical(u"DBusException: %s", error)
1481
sys.exit(1)
1482
# End of Avahi example code
2868
1483
2869
1484
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2870
1485
lambda *args, **kwargs:
2871
1486
(tcp_server.handle_request
2872
1487
(*args[2:], **kwargs) or True))
2873
1488
2874
logger.debug("Starting main loop")
1489
logger.debug(u"Starting main loop")
2875
1490
main_loop.run()
2876
except AvahiError as error:
2877
logger.critical("Avahi Error", exc_info=error)
2878
cleanup()
1491
except AvahiError, error:
1492
logger.critical(u"AvahiError: %s", error)
2879
1493
sys.exit(1)
2880
1494
except KeyboardInterrupt:
2881
1495
if debug:
2882
print("", file=sys.stderr)
2883
logger.debug("Server received KeyboardInterrupt")
2884
logger.debug("Server exiting")
2885
# Must run before the D-Bus bus name gets deregistered
2886
cleanup()
1496
print >> sys.stderr
1497
logger.debug(u"Server received KeyboardInterrupt")
1498
logger.debug(u"Server exiting")
2887
1499
2888
1500
if __name__ == '__main__':
2889
1501
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0